merge pyqtgraph branch with default

This commit is contained in:
Markus Rosenstihl 2014-02-25 15:02:40 +01:00
commit 374ed7e510
13 changed files with 398 additions and 363 deletions

View File

@ -1,2 +1,3 @@
syntax: glob
*.pyc
.idea

View File

@ -2,8 +2,8 @@
# Form implementation generated from reading ui file 'ConductivityGroupBox.ui'
#
# Created: Wed Jul 10 18:57:09 2013
# by: PyQt4 UI code generator 4.10.2
# Created: Fri Feb 21 17:15:59 2014
# by: PyQt4 UI code generator 4.10.3
#
# WARNING! All changes made in this file will be lost!
@ -26,7 +26,7 @@ except AttributeError:
class Ui_ConductivityGroupBox(object):
def setupUi(self, ConductivityGroupBox):
ConductivityGroupBox.setObjectName(_fromUtf8("ConductivityGroupBox"))
ConductivityGroupBox.resize(289, 168)
ConductivityGroupBox.resize(255, 150)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
@ -37,7 +37,7 @@ class Ui_ConductivityGroupBox(object):
self.gridLayout_2.setObjectName(_fromUtf8("gridLayout_2"))
self.gridLayout = QtGui.QGridLayout()
self.gridLayout.setSizeConstraint(QtGui.QLayout.SetFixedSize)
self.gridLayout.setSpacing(5)
self.gridLayout.setSpacing(1)
self.gridLayout.setContentsMargins(0, 0, -1, -1)
self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
self.checkBox_2 = QtGui.QCheckBox(ConductivityGroupBox)
@ -73,6 +73,7 @@ class Ui_ConductivityGroupBox(object):
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_2.sizePolicy().hasHeightForWidth())
self.pushButton_2.setSizePolicy(sizePolicy)
self.pushButton_2.setAutoRepeat(True)
self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
self.gridLayout.addWidget(self.pushButton_2, 1, 3, 1, 1)
self.label_2 = QtGui.QLabel(ConductivityGroupBox)
@ -90,6 +91,8 @@ class Ui_ConductivityGroupBox(object):
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_5.sizePolicy().hasHeightForWidth())
self.pushButton_5.setSizePolicy(sizePolicy)
self.pushButton_5.setMinimumSize(QtCore.QSize(50, 0))
self.pushButton_5.setAutoRepeat(True)
self.pushButton_5.setObjectName(_fromUtf8("pushButton_5"))
self.gridLayout.addWidget(self.pushButton_5, 3, 2, 1, 1)
self.pushButton_6 = QtGui.QPushButton(ConductivityGroupBox)
@ -98,6 +101,7 @@ class Ui_ConductivityGroupBox(object):
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_6.sizePolicy().hasHeightForWidth())
self.pushButton_6.setSizePolicy(sizePolicy)
self.pushButton_6.setAutoRepeat(True)
self.pushButton_6.setObjectName(_fromUtf8("pushButton_6"))
self.gridLayout.addWidget(self.pushButton_6, 3, 3, 1, 1)
self.lineEdit_2 = QtGui.QLineEdit(ConductivityGroupBox)
@ -137,6 +141,8 @@ class Ui_ConductivityGroupBox(object):
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_3.sizePolicy().hasHeightForWidth())
self.pushButton_3.setSizePolicy(sizePolicy)
self.pushButton_3.setMinimumSize(QtCore.QSize(50, 0))
self.pushButton_3.setAutoRepeat(True)
self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
self.gridLayout.addWidget(self.pushButton_3, 2, 2, 1, 1)
self.pushButton_4 = QtGui.QPushButton(ConductivityGroupBox)
@ -145,6 +151,7 @@ class Ui_ConductivityGroupBox(object):
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_4.sizePolicy().hasHeightForWidth())
self.pushButton_4.setSizePolicy(sizePolicy)
self.pushButton_4.setAutoRepeat(True)
self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
self.gridLayout.addWidget(self.pushButton_4, 2, 3, 1, 1)
self.pushButton_1 = QtGui.QPushButton(ConductivityGroupBox)
@ -153,6 +160,8 @@ class Ui_ConductivityGroupBox(object):
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.pushButton_1.sizePolicy().hasHeightForWidth())
self.pushButton_1.setSizePolicy(sizePolicy)
self.pushButton_1.setMinimumSize(QtCore.QSize(50, 0))
self.pushButton_1.setAutoRepeat(True)
self.pushButton_1.setAutoDefault(False)
self.pushButton_1.setDefault(False)
self.pushButton_1.setFlat(False)

View File

@ -6,8 +6,8 @@
<rect>
<x>0</x>
<y>0</y>
<width>289</width>
<height>168</height>
<width>255</width>
<height>150</height>
</rect>
</property>
<property name="sizePolicy">
@ -41,7 +41,7 @@
<number>0</number>
</property>
<property name="spacing">
<number>5</number>
<number>1</number>
</property>
<item row="2" column="4">
<widget class="QCheckBox" name="checkBox_2">
@ -106,6 +106,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="2" column="0">
@ -132,9 +135,18 @@
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>50</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="3" column="3">
@ -148,6 +160,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="2" column="1">
@ -219,9 +234,18 @@
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>50</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="2" column="3">
@ -235,6 +259,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="1" column="2">
@ -245,9 +272,18 @@
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>50</width>
<height>0</height>
</size>
</property>
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
<property name="autoDefault">
<bool>false</bool>
</property>

View File

@ -34,7 +34,7 @@ class ConductivityWidget(QGroupBox):
self.signalMapper.mapped.connect(self.changeValues)
def changeValues(self, num):
logstep = 1.29154967 # 10 log even steps per decade
logstep = 10**0.05 # 10 log even steps per decade
linstep = 0.05
# 0-3 down/up for d_eps and tau, respectively
# 4-7 down, up for a, b

View File

@ -2,8 +2,8 @@
# Form implementation generated from reading ui file 'PeakGroupBox.ui'
#
# Created: Wed Jul 10 18:57:09 2013
# by: PyQt4 UI code generator 4.10.2
# Created: Fri Feb 21 17:15:59 2014
# by: PyQt4 UI code generator 4.10.3
#
# WARNING! All changes made in this file will be lost!
@ -68,6 +68,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_7.sizePolicy().hasHeightForWidth())
self.pushButton_7.setSizePolicy(sizePolicy)
self.pushButton_7.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_7.setAutoRepeat(True)
self.pushButton_7.setObjectName(_fromUtf8("pushButton_7"))
self.gridLayout.addWidget(self.pushButton_7, 4, 2, 1, 1)
self.label_2 = QtGui.QLabel(PeakGroupBox)
@ -96,6 +97,7 @@ class Ui_PeakGroupBox(object):
self.pushButton_1.setSizePolicy(sizePolicy)
self.pushButton_1.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_1.setBaseSize(QtCore.QSize(0, 0))
self.pushButton_1.setAutoRepeat(True)
self.pushButton_1.setAutoDefault(False)
self.pushButton_1.setDefault(False)
self.pushButton_1.setFlat(False)
@ -109,6 +111,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_6.sizePolicy().hasHeightForWidth())
self.pushButton_6.setSizePolicy(sizePolicy)
self.pushButton_6.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_6.setAutoRepeat(True)
self.pushButton_6.setObjectName(_fromUtf8("pushButton_6"))
self.gridLayout.addWidget(self.pushButton_6, 3, 3, 1, 1)
self.label = QtGui.QLabel(PeakGroupBox)
@ -127,6 +130,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_5.sizePolicy().hasHeightForWidth())
self.pushButton_5.setSizePolicy(sizePolicy)
self.pushButton_5.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_5.setAutoRepeat(True)
self.pushButton_5.setObjectName(_fromUtf8("pushButton_5"))
self.gridLayout.addWidget(self.pushButton_5, 3, 2, 1, 1)
self.removeButton = QtGui.QPushButton(PeakGroupBox)
@ -146,6 +150,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_8.sizePolicy().hasHeightForWidth())
self.pushButton_8.setSizePolicy(sizePolicy)
self.pushButton_8.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_8.setAutoRepeat(True)
self.pushButton_8.setObjectName(_fromUtf8("pushButton_8"))
self.gridLayout.addWidget(self.pushButton_8, 4, 3, 1, 1)
self.label_3 = QtGui.QLabel(PeakGroupBox)
@ -165,6 +170,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_4.sizePolicy().hasHeightForWidth())
self.pushButton_4.setSizePolicy(sizePolicy)
self.pushButton_4.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_4.setAutoRepeat(True)
self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
self.gridLayout.addWidget(self.pushButton_4, 2, 3, 1, 1)
self.label_1 = QtGui.QLabel(PeakGroupBox)
@ -207,6 +213,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_3.sizePolicy().hasHeightForWidth())
self.pushButton_3.setSizePolicy(sizePolicy)
self.pushButton_3.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_3.setAutoRepeat(True)
self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
self.gridLayout.addWidget(self.pushButton_3, 2, 2, 1, 1)
self.label_4 = QtGui.QLabel(PeakGroupBox)
@ -229,6 +236,7 @@ class Ui_PeakGroupBox(object):
sizePolicy.setHeightForWidth(self.pushButton_2.sizePolicy().hasHeightForWidth())
self.pushButton_2.setSizePolicy(sizePolicy)
self.pushButton_2.setMinimumSize(QtCore.QSize(56, 0))
self.pushButton_2.setAutoRepeat(True)
self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
self.gridLayout.addWidget(self.pushButton_2, 1, 3, 1, 1)
self.gridLayout.setColumnStretch(1, 1)

View File

@ -108,6 +108,9 @@
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="2" column="0">
@ -168,6 +171,9 @@
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
<property name="autoDefault">
<bool>false</bool>
</property>
@ -199,6 +205,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="0" column="4">
@ -234,6 +243,9 @@
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="0" column="1">
@ -275,6 +287,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="3" column="0">
@ -313,6 +328,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="1" column="0">
@ -402,6 +420,9 @@
<property name="text">
<string>-</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
<item row="4" column="0">
@ -447,6 +468,9 @@
<property name="text">
<string>+</string>
</property>
<property name="autoRepeat">
<bool>true</bool>
</property>
</widget>
</item>
</layout>

View File

@ -67,9 +67,8 @@ class PeakWidget(QGroupBox):
self.setTitle("Peak %i" % id)
def setColor(self, color):
r, g, b = color
palette = self.palette()
palette.setColor(QPalette.Foreground, QColor(r, g, b))
palette.setColor(QPalette.Foreground, color)
self.setPalette(palette)
def peakParameter(self):

344
QDS.py
View File

@ -7,110 +7,28 @@ import signal
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import matplotlib
from mathlib import fit_anneal, fit_lbfgsb, fit_odr, hn, id_to_color
from matplotlibWidget import PlotWidget
from mathlib import fit_anneal, fit_lbfgsb, fit_odr, hn
matplotlib.use('agg')
#from matplotlibWidget import PlotWidget
from matplotlib import pyplot
from matplotlib.colors import hex2color
#matplotlib.rc_file("default.mplrc")
import numpy as N
import QDSMain
import PeakWidget
from data import Data, Conductivity, conductivity
from data import Data, Conductivity, conductivity, Peak
import pyqtgraph as pg
#import yaff
def sigint_handler(*args):
"""Handler for the SIGINT signal (CTRL + C).
"""
sys.stderr.write('\r')
if QMessageBox.question(None, '', "Are you sure you want to quit?",
QMessageBox.Yes | QMessageBox.No,
QMessageBox.No) == QMessageBox.Yes:
QApplication.quit()
def tau_peak(f, a, b):
tau = (N.sin(N.pi * a / 2. / (b + 1)) / N.sin(N.pi * a * b / 2. / (b + 1))) ** (1 / a)
tau /= 2 * N.pi * f
return tau
class Peak(QObject):
changedData = pyqtSignal()
def __init__(self, id=None, mpl=None):
QObject.__init__(self)
super(Peak, self).__init__()
self.color = id_to_color(id)
self.widget = PeakWidget.PeakWidget()
self.widget.setId(id)
self.widget.setColor(map(int, [255 * i for i in self.color]))
self.widget.changedTable.connect(self.updatePeak)
self.mpl = mpl
self.mpl_line = None
def getParameter(self):
p = self.widget.peakParameter()
return p
def getFixed(self):
p = self.widget.fixedParameter()
return p
def setParameter(self, delta_eps=None, tau=None, a=None, b=None):
self.widget.updateTable(delta_eps, tau, a, b)
self.updatePeak()
def updatePeak(self):
# get current axis limits
x_min, x_max = self.mpl.canvas.axes.get_xlim()
y_min, y_max = self.mpl.canvas.axes.get_ylim()
nu = N.logspace(N.log10(x_min), N.log10(x_max), 2048)
y = hn(self.getParameter(), nu)
# clip data to axes limits
mask = (y < y_max) & (y > y_min)
y = y[mask]
nu = nu[mask]
if self.mpl_line == None:
self.mpl_line, = self.mpl.canvas.axes.loglog(nu, y, '--', label="Peak %i" % (self.widget.id),
animated=True) # peak
self.mpl_line.set_color(self.color)
else:
self.mpl_line.set_xdata(nu)
self.mpl_line.set_ydata(y)
self.changedData.emit()
class AppWindow(QMainWindow):
def __init__(self, parent=None):
super(AppWindow, self).__init__(parent)
@ -132,6 +50,13 @@ class AppWindow(QMainWindow):
openFile.setShortcut(QKeySequence.Open)
openFile.triggered.connect(self.openFile)
fileMenu.addAction(openFile)
saveFile = QAction("&Save Fit Result", self)
saveFile.setShortcut(QKeySequence.Save)
saveFile.triggered.connect(self.saveFitResult)
fileMenu.addAction(saveFile)
# fitting methods
fitMenu = self.menuBar().addMenu("Standard Fits")
# lm
@ -159,39 +84,41 @@ class AppWindow(QMainWindow):
self.signalMapper.mapped.connect(self.fitData)
# save fitted values
self.ui.actionSave_FitResult.triggered.connect(self.saveFitResult)
# the plot area, a matplotlib widget
self.mplWidget = PlotWidget(self.ui.mplWidget)
self.mplWidget.canvas.draw()
self.mplWidget.updateGeometry()
# what to do with CIDs?
self.cid = []
self.cid.append(self.mplWidget.canvas.mpl_connect("button_press_event", self.mpl_button_press))
self.cid.append(self.mplWidget.canvas.mpl_connect("pick_event", self.mpl_button_pick))
self.cid.append(self.mplWidget.canvas.mpl_connect("button_release_event", self.mpl_button_release))
#self.cid.append(self.mplWidget.canvas.mpl_connect("resize_event", self.myresizeEvent))
self.mplWidget.toolbar.spanSelectedTrigger.connect(self.set_fit_xlimits)
#self.ui.actionSave_FitResult.triggered.connect(self.saveFitResult)# replaced by menu
def resizeEvent(self, evt):
"""resizing the main window executes this method
TODO: FIX RESIZEING keeping mainwindow maximised for now
:param evt:
"""
self.mplWidget.canvas.draw()
self.mplWidget._bg_cache = self.mplWidget.canvas.copy_from_bbox(self.mplWidget.canvas.axes.bbox)
for line in self.mplWidget.canvas.axes.get_lines():
line.set_animated(False)
self.mplWidget.canvas.draw()
for line in self.mplWidget.canvas.axes.get_lines():
line.set_animated(True)
self.data = Data()
self.fit_boundary = pg.LinearRegionItem(brush=QColor(254,254,254,10))
self.ui.graphicsView.addItem(self.data.data_curve)
self.ui.graphicsView.addItem(self.data.fitted_curve)
self.ui.graphicsView.addItem(self.fit_boundary)
self.ui.graphicsView.setLogMode(x=True, y=True)
self.ui.graphicsView.showGrid(x=True, y=True)
self.ui.graphicsView.setLabel("bottom","Frequency",units="Hz")
self.ui.graphicsView.setLabel("left", "Dielectric loss", units="Debye")
self.peak_box_layout = QGridLayout()
self.ui.scrollAreaWidgetContents.setLayout(self.peak_box_layout)
def mousePressEvent(self, evt):
pos = evt.pos()
if self.ui.graphicsView.sceneRect().contains(pos):
# translate position to data coordinates
data_pos = self.ui.graphicsView.plotItem.vb.mapSceneToView(pos)
if self.ui.actionAdd_Peak.isChecked() and not self.ui.actionAdd_Cond.isChecked():
self.addPeak(data_pos)
self.ui.actionAdd_Peak.setChecked(False)
if self.ui.actionAdd_Cond.isChecked() and not self.ui.actionAdd_Peak.isChecked():
self.addCond(data_pos)
self.ui.actionAdd_Cond.setChecked(False)
def saveFitResult(self):
"""
Saving fit parameters to fitresults.log
including temperature
"""
self.saveFitFigure()
if not os.path.exists("fitresults.log"):
f = open("fitresults.log", "w")
else:
@ -215,44 +142,56 @@ class AppWindow(QMainWindow):
N.savetxt(f, N.array([pars, ]), fmt=parfmt, delimiter=" ")
f.close()
def saveFitFigure(self):
fig = pyplot.Figure(figsize=(3.54, 2.75))
font = {'family' : 'sans serif',
'weight' : 'normal',
'size' : 16}
matplotlib.rc('font', **font)
print self.data.epsilon_fit.shape, type(self.data.epsilon_fit)
pyplot.loglog(self.data.frequency, self.data.epsilon.imag, 'bo', markersize=4, label="Data")
pyplot.loglog(self.data.frequency, self.data.epsilon_fit, 'r-', lw=2, label="Fit")
for i,peak in enumerate(self.peakBoxes):
f,eps = peak.get_data()
color = hex2color(str(peak.get_color().name()))
pyplot.loglog(f,eps, ls="--", color=color , lw=1.5, label="Peak %i"%i)
if self.Conductivity != None:
f,eps = self.Conductivity.get_conductivity()
color = hex2color(str(self.Conductivity.get_color().name()))
pyplot.loglog(f,eps, ls="-.", color=color, lw=1.5, label="Cond.")
f,eps = self.Conductivity.get_epsilon_static()
pyplot.loglog(f,eps, ls=":", color=color, lw=1.5, label=r'$\epsilon_0$')
pyplot.legend(title="T=%.1f K"%(self.data.meta["T"]) )
pyplot.grid()
pyplot.xlabel('f/Hz')
pyplot.ylabel('eps"')
pyplot.savefig("test.png")
fig.clear()
def set_fit_xlimits(self, xmin, xmax):
self.data.fit_limits = (xmin, xmax, None, None)
self.updatePlot()
def mpl_button_release(self, event):
ax = self.mplWidget.canvas.axes
if self.picked_artist:
if not event.inaxes: # moved outside the plot, add back to original position
ax.add_artist(self.picked_artist)
else: # we move one of the three points determinig the peak
self.picked_artist.set_xdata(event.xdata)
self.picked_artist.set_ydata(event.ydata)
ax.add_artist(self.picked_artist)
for peak in self.peakBoxes.keys():
peak.updatePeak()
self.picked_artist = None
self.mplWidget.canvas.draw_idle()
def mpl_button_pick(self, event):
self.picked_artist = event.artist
event.artist.remove()
self.mplWidget.canvas.draw_idle()
def addCond(self, pos):
if self.Conductivity != None:
return
self.statusBar().showMessage("Click on graph")
self.Conductivity = Conductivity(mpl=self.mplWidget)
self.Conductivity = Conductivity(mpl=self.ui.graphicsView, limits=self.data.fit_limits)
self.Conductivity.changedData.connect(self.updatePlot)
self.Conductivity.setParameter(0, 1 / (pos[0] / pos[1] / 2 / N.pi), 1.0)
self.Conductivity.setParameter(0, 1 / (10**pos.x() / 10**pos.y() / 2 / N.pi), 1.0)
self.ui.scrollAreaWidgetContents.layout().addWidget(self.Conductivity.widget)
self.Conductivity.widget.ui.removeButton.clicked.connect(self.delCond)
def delCond(self):
self.cond_param = None
self.cond = None
self.Conductivity.mpl_line.remove()
self.Conductivity.mpl_line_static.remove()
self.ui.graphicsView.removeItem(self.Conductivity.mpl_line)
self.ui.graphicsView.removeItem(self.Conductivity.mpl_line_static)
del self.Conductivity
self.Conductivity = None
self.updatePlot()
@ -262,27 +201,27 @@ class AppWindow(QMainWindow):
self.peakId += 1
self.statusBar().showMessage("Select Peak Position")
peak = Peak(id=self.peakId, mpl=self.mplWidget)
peak = Peak(id=self.peakId, mpl=self.ui.graphicsView, limits=self.data.fit_limits)
# connect to delPeak
peak.widget.ui.removeButton.clicked.connect(self.delPeak)
peak.setParameter(delta_eps=pos[1], tau=1 / (2. * N.pi * pos[0]), a=1, b=1)
peak.changedData.connect(self.updatePlot)
peak.setParameter(delta_eps=10**pos.y(), tau=1 / (10**pos.x()/2/N.pi), a=1, b=1)
self.peakBoxes[peak] = None
for pb in self.peakBoxes.keys():
self.ui.scrollAreaWidgetContents.layout().addWidget(pb.widget)
self.updatePlot()
wdgt_num = self.peak_box_layout.rowCount()
for i,pb in enumerate(self.peakBoxes.keys()):
self.peak_box_layout.addWidget(pb.widget, i+wdgt_num, 0)
#self.ui.scrollArea.resize()
# self.updatePlot()
def delPeak(self):
deletePeaks = []
for i in xrange(self.ui.scrollAreaWidgetContents.layout().count()):
for i in xrange(self.peak_box_layout.count()):
print i
for i, peak in enumerate(self.peakBoxes.keys()):
if peak.widget.isHidden():
peak.mpl_line.remove()
self.ui.graphicsView.removeItem(peak.mpl_line)
deletePeaks.append(peak)
for peak in deletePeaks:
self.peakBoxes.pop(peak)
@ -300,6 +239,9 @@ class AppWindow(QMainWindow):
[start_parameter.append(i) for i in pb.getParameter()]
[fixed_params.append(i) for i in pb.getFixed()]
log10fmin, log10fmax = self.fit_boundary.getRegion()
xmin,xmax,ymin,ymax = self.data.fit_limits
self.data.fit_limits = [10**log10fmin, 10**log10fmax,ymin,ymax]
fit_methods = [fit_odr, fit_lbfgsb, fit_anneal]
print "StartParameter", start_parameter
print "FixedParameter", fixed_params
@ -318,27 +260,12 @@ class AppWindow(QMainWindow):
#print u"\u0394\u03b5"
self.updatePlot()
def mpl_button_press(self, event):
"""
Handles the clicks on the matplotlib figure canvas
"""
if self.ui.actionAdd_Peak.isChecked() and event.inaxes:
x, y = event.xdata, event.ydata
self.addPeak((x, y))
self.ui.actionAdd_Peak.setChecked(False)
self.statusBar().clear()
if self.ui.actionAdd_Cond.isChecked() and event.inaxes:
x, y = event.xdata, event.ydata
self.addCond((x, y))
self.ui.actionAdd_Cond.setChecked(False)
self.statusBar().clear()
def openFile(self):
ax = self.mplWidget.canvas.axes
ax.clear()
path = unicode(QFileDialog.getOpenFileName(self, "Open file"))
#path = "MCM42PG0_199.96K.dat"
# TODO anaylize file (LF,MF, HF) and act accordingly
data = N.loadtxt(path, skiprows=4)
self.setWindowTitle(os.path.basename(path))
numpat = re.compile('\d+\.\d+')
try:
Temp = None
@ -356,93 +283,40 @@ class AppWindow(QMainWindow):
_freq = data[mask, 0]
_die_stor = data[mask, 1]
_die_loss = data[mask, 2]
# clear the figure
ax.clear()
#if self.data != None:
# self.data.remove_curves()
self.data = Data(_freq, _die_stor, _die_loss)
self.data.set_data(_freq, _die_stor, _die_loss)
self.data.meta["T"] = Temp
self.data.data_curve, = ax.loglog(self.data.frequency,
self.data.epsilon.imag,
'b.',
markersize=4,
label="Data",
animated=True)
ax.set_xlabel("Frequency/Hz", fontsize=16)
#ax.set_ylabel(u'\u03B5"', fontsize=16)
ax.set_ylabel(u'e"', fontsize=16)
self.fit_boundary.setRegion([N.log10(_freq.min()), N.log10(_freq.max())])
ax.autoscale(True)
ax.set_xlim(_freq.min()/3, _freq.max()*3)
self.legend = ax.legend(title="T=%.2f" % Temp)
for line in ax.get_lines():
line.set_animated(False)
ax.grid()
self.mplWidget.canvas.draw()
# weird behaviour need to draw all first, then set_animated the redraw
for line in ax.get_lines():
line.set_animated(True)
self.legend.set_animated(True)
ax.autoscale(False)
self.mplWidget._bg_cache = self.mplWidget.canvas.copy_from_bbox(ax.bbox)
self.updatePlot()
def updatePlot(self):
ax = self.mplWidget.canvas.axes
nu = self.data.frequency
fit = N.zeros(len(nu))
for peak in self.peakBoxes.keys():
params = peak.getParameter()
fit += hn(params, nu)
#fit += peak.get_data()[1]
if self.Conductivity != None:
print "Cond. given"
params = self.Conductivity.getParameter()[1:]
fit += conductivity(params, nu)
fit += self.Conductivity.getParameter()[0] # eps static
# clip data to axes limits
y_min, y_max = ax.get_ylim()
mask = (fit < y_max) & (fit > y_min)
#mask = N.ones(len(fit), dtype="bool")
if self.data.fitted_curve == None:
self.data.fitted_curve, = ax.loglog(nu[mask], fit[mask],
'k-',
alpha=0.5,
label="Sum",
animated=True)
else:
self.data.fitted_curve.set_xdata(nu[mask])
self.data.fitted_curve.set_ydata(fit[mask])
# handling of fit limit bars
# if self.mplWidget._axvlims != []:
# [axv.remove() for axv in self.mplWidget._axvlims]
# self.mplWidget._axvlims = []
# if self.mplWidget._axvname != []:
# [axvname.remove() for axvname in self.mplWidget._axvname]
# self.mplWidget._axvname = []
#print self.mplWidget._axvlims
if self.mplWidget._axvlims == []:
for i,xlim in enumerate(self.data.fit_limits[:2]):
self.mplWidget._axvlims.append(ax.axvline(xlim, color="k", ls="--", alpha=0.5, animated=True))
self.mplWidget._axvname.append(ax.text(xlim, y_min*3. , "%.3g"%xlim,
horizontalalignment='center',
verticalalignment='center',
animated=True) )
else:
for i,xlim in enumerate(self.data.fit_limits[:2]):
self.mplWidget._axvlims[i].set_xdata(xlim)
self.mplWidget._axvname[i].set_x(xlim)
self.mplWidget._axvname[i].set_text("%.3g"%xlim)
self.data.epsilon_fit = fit[:]
self.data.data_curve.setData(self.data.frequency, self.data.epsilon.imag)
if len(self.peakBoxes) > 0 and self.Conductivity != None:
self.data.fitted_curve.setData(nu, fit)
self.mplWidget.canvas.restore_region(self.mplWidget._bg_cache)
self.legend = ax.legend(title="T=%.2f" % (self.data.meta["T"]))
self.legend.set_animated(True)
for animated_artist in ax.findobj(match=lambda x: x.get_animated()):
#print "updatePlot: animated artist:",animated_artist
ax.draw_artist(animated_artist)
self.mplWidget.canvas.blit(ax.bbox)
def sigint_handler(*args):
"""Handler for the SIGINT signal (CTRL + C).
"""
sys.stderr.write('\r')
if QMessageBox.question(None, '', "Are you sure you want to quit?",
QMessageBox.Yes | QMessageBox.No,
QMessageBox.No) == QMessageBox.Yes:
QApplication.quit()
if __name__ == '__main__':
signal.signal(signal.SIGINT, sigint_handler)

View File

@ -2,8 +2,8 @@
# Form implementation generated from reading ui file 'QDSMain.ui'
#
# Created: Wed Jul 10 18:57:09 2013
# by: PyQt4 UI code generator 4.10.2
# Created: Fri Feb 21 17:15:59 2014
# by: PyQt4 UI code generator 4.10.3
#
# WARNING! All changes made in this file will be lost!
@ -26,7 +26,7 @@ except AttributeError:
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(1228, 700)
MainWindow.resize(956, 699)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
@ -41,20 +41,11 @@ class Ui_MainWindow(object):
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.verticalLayout = QtGui.QVBoxLayout(self.centralwidget)
self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
self.horizontalLayout = QtGui.QHBoxLayout()
self.horizontalLayout.setSizeConstraint(QtGui.QLayout.SetDefaultConstraint)
self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
self.mplWidget = QtGui.QWidget(self.centralwidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Preferred)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mplWidget.sizePolicy().hasHeightForWidth())
self.mplWidget.setSizePolicy(sizePolicy)
self.mplWidget.setMinimumSize(QtCore.QSize(600, 400))
self.mplWidget.setObjectName(_fromUtf8("mplWidget"))
self.horizontalLayout.addWidget(self.mplWidget)
self.scrollArea = QtGui.QScrollArea(self.centralwidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Fixed, QtGui.QSizePolicy.Expanding)
self.splitter = QtGui.QSplitter(self.centralwidget)
self.splitter.setOrientation(QtCore.Qt.Horizontal)
self.splitter.setObjectName(_fromUtf8("splitter"))
self.scrollArea = QtGui.QScrollArea(self.splitter)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.scrollArea.sizePolicy().hasHeightForWidth())
@ -64,16 +55,20 @@ class Ui_MainWindow(object):
self.scrollArea.setWidgetResizable(True)
self.scrollArea.setObjectName(_fromUtf8("scrollArea"))
self.scrollAreaWidgetContents = QtGui.QWidget()
self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 298, 568))
self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 298, 572))
self.scrollAreaWidgetContents.setObjectName(_fromUtf8("scrollAreaWidgetContents"))
self.verticalLayout_2 = QtGui.QVBoxLayout(self.scrollAreaWidgetContents)
self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
self.scrollArea.setWidget(self.scrollAreaWidgetContents)
self.horizontalLayout.addWidget(self.scrollArea)
self.verticalLayout.addLayout(self.horizontalLayout)
self.graphicsView = PlotWidget(self.splitter)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(3)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.graphicsView.sizePolicy().hasHeightForWidth())
self.graphicsView.setSizePolicy(sizePolicy)
self.graphicsView.setObjectName(_fromUtf8("graphicsView"))
self.verticalLayout.addWidget(self.splitter)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1228, 22))
self.menubar.setGeometry(QtCore.QRect(0, 0, 956, 22))
self.menubar.setObjectName(_fromUtf8("menubar"))
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(MainWindow)
@ -116,4 +111,5 @@ class Ui_MainWindow(object):
self.actionSave_FitResult.setText(_translate("MainWindow", "Save Fit", None))
self.actionSave_FitResult.setToolTip(_translate("MainWindow", "Save Fit Result", None))
from pyqtgraph import PlotWidget
import images_rc

View File

@ -6,8 +6,8 @@
<rect>
<x>0</x>
<y>0</y>
<width>1228</width>
<height>700</height>
<width>956</width>
<height>699</height>
</rect>
</property>
<property name="sizePolicy">
@ -28,63 +28,52 @@
</property>
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<layout class="QHBoxLayout" name="horizontalLayout">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
<widget class="QSplitter" name="splitter">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<item>
<widget class="QWidget" name="mplWidget" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Preferred" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>600</width>
<height>400</height>
</size>
<widget class="QScrollArea" name="scrollArea">
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>300</width>
<height>0</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>210</width>
<height>16777215</height>
</size>
</property>
<property name="widgetResizable">
<bool>true</bool>
</property>
<widget class="QWidget" name="scrollAreaWidgetContents">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>298</width>
<height>572</height>
</rect>
</property>
</widget>
</item>
<item>
<widget class="QScrollArea" name="scrollArea">
<property name="sizePolicy">
<sizepolicy hsizetype="Fixed" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>300</width>
<height>0</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>210</width>
<height>16777215</height>
</size>
</property>
<property name="widgetResizable">
<bool>true</bool>
</property>
<widget class="QWidget" name="scrollAreaWidgetContents">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>298</width>
<height>568</height>
</rect>
</property>
<layout class="QVBoxLayout" name="verticalLayout_2"/>
</widget>
</widget>
</item>
</layout>
</widget>
<widget class="PlotWidget" name="graphicsView">
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Expanding">
<horstretch>3</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
</widget>
</widget>
</item>
</layout>
</widget>
@ -93,7 +82,7 @@
<rect>
<x>0</x>
<y>0</y>
<width>1228</width>
<width>956</width>
<height>22</height>
</rect>
</property>
@ -156,6 +145,13 @@
</property>
</action>
</widget>
<customwidgets>
<customwidget>
<class>PlotWidget</class>
<extends>QGraphicsView</extends>
<header>pyqtgraph</header>
</customwidget>
</customwidgets>
<resources>
<include location="icons/images.qrc"/>
</resources>

136
data.py
View File

@ -1,14 +1,23 @@
from PyQt4.QtCore import QObject, pyqtSignal
from PyQt4.QtCore import QObject, pyqtSignal, Qt
from PyQt4.QtGui import QColor
import numpy as N
import PeakWidget
import conductivityWidget
import pyqtgraph as pg
from PyQt4.QtCore import *
from mathlib import id_to_color, hn
class Data:
def __init__(self, frequency, die_real, die_imag):
def __init__(self, frequency=N.zeros(1), die_real=N.zeros(1), die_imag=N.zeros(1)):
self.frequency = frequency
self.epsilon = die_real + 1j * die_imag
self.data_curve = None # mpl object
self.fitted_curve = None # mpl object
self.epsilon_fit = die_real*0 + 1j * die_imag*0
myPen = pg.mkPen(width=3, color=(255,255,127))
self.data_curve = pg.PlotDataItem(x=[N.nan], y=[N.nan],pen=QColor(0,0,0,0), symbol='o',
symbolBrush=(255,127,0,127))
self.fitted_curve = pg.PlotDataItem(N.array([N.nan]), N.array([N.nan]), pen=myPen)
self.length = len(frequency)
self.meta = dict()
self.fit_limits = (frequency.min(), frequency.max(), die_imag.min(), die_imag.max())
@ -17,6 +26,14 @@ class Data:
#self.remove_curves()
pass
#def set_fit_limits(self, limits=(None,None,None,None)):
def set_data(self,f,e_real,e_imag):
self.frequency = f
self.epsilon = e_real + 1j*e_imag
self.epsilon_fit = 0*e_real + 1j*e_imag*0
self.fit_limits = (f.min(), f.max(), e_imag.min(), e_imag.max())
self.data_curve.setData(f,e_imag)
def get_data(self):
"""
@ -28,22 +45,32 @@ class Data:
def remove_curves(self):
print "remove data_curve"
if self.data_curve is not None: self.data_curve.remove()
#if self.data_curve is not None: self.data_curve.remove()
print "remove fitted_curve"
if self.fitted_curve is not None: self.fitted_curve.remove()
#if self.fitted_curve is not None: self.fitted_curve.remove()
class Conductivity(QObject):
changedData = pyqtSignal()
def __init__(self, mpl=None):
def __init__(self, mpl=None, limits=None):
QObject.__init__(self)
super(Conductivity, self)
self.widget = conductivityWidget.ConductivityWidget()
self.widget.changedTable.connect(self.updateData)
self.mpl_line = None
self.mpl_line_static = None
myPen = pg.mkPen( style=Qt.DashLine, width=1)
self.color=QColor("black")
self.mpl_line = pg.PlotDataItem(x=N.array([N.nan]), y=N.array([N.nan]), pen=myPen)
self.mpl_line_static = pg.PlotDataItem(x=N.array([N.nan]), y=N.array([N.nan]), pen=myPen)
self.mpl = mpl
self.mpl.addItem(self.mpl_line)
self.mpl.addItem(self.mpl_line_static)
self.limits = limits
self.frequency = None
self.conductivity = None
self.epsilon_static = None
def getParameter(self):
@ -60,9 +87,7 @@ class Conductivity(QObject):
def updateData(self):
# get current axis limits
x_min, x_max = self.mpl.canvas.axes.get_xlim()
y_min, y_max = self.mpl.canvas.axes.get_ylim()
x_min, x_max, y_min, y_max = self.limits
nu = N.logspace(N.log10(x_min), N.log10(x_max), 1024)
eps_static, sigma, sigma_N = self.getParameter()
y = conductivity([sigma, sigma_N], nu)
@ -71,26 +96,79 @@ class Conductivity(QObject):
mask_static = (y_static < y_max) & (y_static > y_min)
# clip data to axes limits
mask = (y < y_max) & (y > y_min)
#mask = mask_static = N.ones(1024, dtype='bool')
if self.mpl_line == None:
self.mpl_line, = self.mpl.canvas.axes.loglog(nu[mask], y[mask], 'k--', label="Cond.", animated=True) # peak
else:
self.mpl_line.set_xdata(nu[mask])
self.mpl_line.set_ydata(y[mask])
if self.mpl_line_static == None:
self.mpl_line_static, = self.mpl.canvas.axes.loglog(nu[mask_static],
y_static[mask_static],
'k:',
label=r"$\epsilon_S$",
animated=True) # peak
else:
self.mpl_line_static.set_xdata(nu[mask_static])
self.mpl_line_static.set_ydata(y_static[mask_static])
self.frequency = nu[mask]
self.conductivity = y[mask]
self.epsilon_static = y_static[mask]
self.mpl_line.setData(x=nu[mask], y=y[mask], label="Cond.")
self.mpl_line_static.setData(x=nu[mask_static], y=y_static[mask_static])
self.changedData.emit()
def get_color(self):
return self.color
def get_conductivity(self):
return self.frequency, self.conductivity
def get_epsilon_static(self):
return self.frequency, self.epsilon_static
def conductivity(p, nu):
c = p[0] / (2 * N.pi * nu) ** p[1]
return c
return c
class Peak(QObject):
changedData = pyqtSignal()
def __init__(self, id=None, mpl=None, limits=None):
QObject.__init__(self)
super(Peak, self).__init__()
self.widget = PeakWidget.PeakWidget()
self.widget.setId(id)
self.color = id_to_color(id)
self.widget.setColor(self.color)
self.widget.changedTable.connect(self.updatePeak)
self.mpl = mpl
self.limits = limits
myPen = pg.mkPen( style=Qt.DashLine, width=2, color=self.color)
self.mpl_line = pg.PlotDataItem(x=N.array([N.nan]),y=N.array([N.nan]), pen=myPen)
self.mpl.addItem(self.mpl_line)
self.frequency = None
self.epsilon = None
def getParameter(self):
p = self.widget.peakParameter()
return p
def getFixed(self):
p = self.widget.fixedParameter()
return p
def setParameter(self, delta_eps=None, tau=None, a=None, b=None):
self.widget.updateTable(delta_eps, tau, a, b)
self.updatePeak()
def updatePeak(self):
# get current axis limits
# x_min, x_max = self.mpl.canvas.axes.get_xlim()
# y_min, y_max = self.mpl.canvas.axes.get_ylim()
x_min,x_max, y_min, y_max = self.limits
nu = N.logspace(N.log10(x_min), N.log10(x_max), 2048)
y = hn(self.getParameter(), nu)
# clip data to axes limits
mask = (y < y_max) & (y > y_min)
y = y[mask]
nu = nu[mask]
self.frequency = nu[:]
self.epsilon = y[:]
self.mpl_line.setData(x=nu, y=y)
self.changedData.emit()
def get_color(self):
return self.color
def get_data(self):
return self.frequency,self.epsilon

View File

@ -2,8 +2,8 @@
# Resource object code
#
# Created: Mi. Jul 10 18:57:09 2013
# by: The Resource Compiler for PyQt (Qt v4.8.4)
# Created: Fr. Feb. 21 17:15:59 2014
# by: The Resource Compiler for PyQt (Qt v4.8.5)
#
# WARNING! All changes made in this file will be lost!

View File

@ -3,7 +3,7 @@ import matplotlib
import numpy as N
from scipy import optimize as opt, optimize, odr
#from QDS import mini_func, multi_hn
from PyQt4.QtGui import QColor
__author__ = 'markusro'
@ -59,7 +59,7 @@ def fit_lbfgsb(x, y, p0, fixed):
def fit_odr(x, y, p0, fixed):
dat = odr.Data(x, y, 1.0 / y)
dat = odr.Data(x, y, 1.0 / y**2)
mod = odr.Model(multi_hn)
fit = odr.ODR(dat, mod, p0, ifixx=(0,), ifixb=fixed, maxit=2000)
fit.run()
@ -82,8 +82,16 @@ def id_to_color(id):
"""
colors = ['b', 'r', 'g', 'c', 'm', 'y', 'k']
conv = matplotlib.colors.ColorConverter()
return conv.to_rgb(colors[id % len(colors)])
colors = [QColor(54,22,115),
QColor(160,16,36),
QColor(45,142,15),
QColor(168,149,17),
QColor(36,10,85),
QColor(118,8,23),
QColor(31,105,7),
QColor(124,109,8),
]
return colors[id % len(colors)]
def mini_func(p, x, y):
@ -110,4 +118,10 @@ def multi_hn(p, nu):
e_loss += 2 * delta_eps * (1 + 2 * (om * tau) ** a * N.cos(N.pi * a / 2.) + (om * tau) ** (2. * a) ) ** (
-b / 2.) * N.sin(b * Phi)
#e_stor = delta_eps * (1+ 2*(om*tau)**a * N.cos(N.pi*a/2.) + (om*tau)**(2.*a) )**(-b/2.)*N.cos(b*Phi)
return e_loss
return e_loss
def tau_peak(f, a, b):
tau = (N.sin(N.pi * a / 2. / (b + 1)) / N.sin(N.pi * a * b / 2. / (b + 1))) ** (1 / a)
tau /= 2 * N.pi * f
return tau