qdsfit/QDS.py

#!/usr/bin/env python
# -*- encoding: utf-8 -*-
_author_ = "Markus Rosenstihl"

import os,sys,re,signal

import matplotlib
matplotlib.use('agg')
from matplotlib import pyplot
from matplotlib.colors import hex2color
#matplotlib.rc_file("default.mplrc")


from PyQt4.QtCore import *
from PyQt4.QtGui import *

import numpy as np
import pyqtgraph as pg

from Container import Conductivity, PowerComplex, Static, Peak, YAFF
from ContainerWidgets import ParameterWidget
from Mathlib import FunctionRegister, FitRoutine
from Data import Data

import QDSMain

class AppWindow(QMainWindow):


    def __init__(self, files=[], parent=None):
        super(AppWindow, self).__init__(parent)
        self.ui = QDSMain.Ui_MainWindow()
        self.ui.setupUi(self)
        self._file_paths = QStringList(files)
        self._last_written_header = None

        actions = {
            self.ui.actionAdd_Peak:self.addPeak,
            self.ui.actionAdd_Cond:self.addCond,
            self.ui.actionAdd_PowerLaw:self.addPowerComplex,
            self.ui.actionAdd_Eps_Infty:self.addEpsInfty,
            self.ui.actionYAFF:self.addYaff,
        }

        self.myActionGroup = QActionGroup(self)
        for a in actions.keys(): self.myActionGroup.addAction(a)

        self._init_menu()

        self.function_registry = FunctionRegister()

        self.peakId = 0

        self.parameterWidget = ParameterWidget()
        self.ui.dockWidget_3.setWidget(self.parameterWidget)


        self.data = Data()

        self.fit_boundary_imag = pg.LinearRegionItem(brush=QColor(0,127,254,15))
        self.fit_boundary_real = pg.LinearRegionItem(brush=QColor(0,127,254,15))

        self.ui.pgPlotWidget_imag.addItem(self.data.data_curve_imag)
        self.ui.pgPlotWidget_real.addItem(self.data.data_curve_real)
        self.ui.pgPlotWidget_imag.addItem(self.data.fitted_curve_imag)
        self.ui.pgPlotWidget_real.addItem(self.data.fitted_curve_real)

        self.ui.pgPlotWidget_imag.addItem(self.fit_boundary_imag)
        self.ui.pgPlotWidget_real.addItem(self.fit_boundary_real)

        self.fit_boundary_imag.sigRegionChanged.connect(self._update_fit_boundary_real)
        self.fit_boundary_real.sigRegionChanged.connect(self._update_fit_boundary_imag)

        for pltwidgt in (self.ui.pgPlotWidget_real, self.ui.pgPlotWidget_imag):
            pltwidgt.setLogMode(x=True, y=True)
            pltwidgt.showGrid(x=True, y=True)
            pltwidgt.disableAutoRange()
            pltwidgt.setLabel("bottom", "Frequency", units="Hz")

        self.ui.pgPlotWidget_imag.setLabel("left", u'Dielectric loss ε"' , units="Debye")
        self.ui.pgPlotWidget_real.setLabel("left", u"Dielectric loss ε' ", units="Debye")

        sc_real = self.ui.pgPlotWidget_real.scene()
        sc_real.sigMouseClicked.connect(self.mousePress)
        sc_real.sigMouseMoved.connect(self.updateCrosshair)

        sc_imag = self.ui.pgPlotWidget_imag.scene()
        sc_imag.sigMouseClicked.connect(self.mousePress)
        sc_imag.sigMouseMoved.connect(self.updateCrosshair)

        # process cmd line args
        if files != []:
            self.openFile(files[0])
            self._current_file_index = 0

        self._fit_thread = QThread()
        self._fit_method = FitRoutine()
        self._fit_method.moveToThread(self._fit_thread)
        self._fit_method.finished_fit.connect(self.fitData_update)
        self._fit_method.data_ready.connect(self.updateIntermediatePlot)
        self._fit_thread.started.connect(self._fit_method.fit)

    def _init_menu(self):
        fileMenu = self.menuBar().addMenu("File")

        openFile = QAction("&Open", self)
        openFile.setShortcut(QKeySequence.Open)
        openFile.triggered.connect(self.getFileNames)
        fileMenu.addAction(openFile)

        nextFile = QAction("Next", self)
        nextFile.setShortcut(QKeySequence("Ctrl+k"))
        nextFile.triggered.connect(self.nextFile)
        fileMenu.addAction(nextFile)

        previousFile = QAction("Previous", self)
        previousFile.setShortcut(QKeySequence("Ctrl+j"))
        previousFile.triggered.connect(self.previousFile)
        fileMenu.addAction(previousFile)

        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
        fit_lmAction = QAction("Complex NLS", self)
        fit_lmAction.setShortcut(QKeySequence("Ctrl+F"))
        fitMenu.addAction(fit_lmAction)
        # lbfgsb
        fit_lbfgsbAction = QAction("NLS (Imag.)", self)
        fitMenu.addAction(fit_lbfgsbAction)
        # Simulated Annealing
        fit_annealAction = QAction("&Simulated Annealing", self)
        fitMenu.addAction(fit_annealAction)

        self.ui.actionActionAbortFit.triggered.connect(self.abortFit)

        self.signalMapper = QSignalMapper(self)
        for i, fit_action in enumerate([fit_lmAction, fit_lbfgsbAction, fit_annealAction
        ]):
            self.signalMapper.setMapping(fit_action, i)
            fit_action.triggered.connect(self.signalMapper.map)
        self.signalMapper.mapped.connect(self.fitData_start)


    def updateCrosshair(self,evt):

        vb_real = self.ui.pgPlotWidget_real.getPlotItem().vb
        vb_imag = self.ui.pgPlotWidget_imag.getPlotItem().vb
        if self.ui.pgPlotWidget_imag.underMouse():
            pos = vb_imag.mapSceneToView(evt)
        elif self.ui.pgPlotWidget_real.underMouse():
            pos = vb_real.mapSceneToView(evt)
        else:
            pos = QPointF(0.0, 0.0)
        self.last_pos = pos

    def mousePress(self, evt):
        data_pos = self.last_pos
        mouse_in_imag = self.ui.pgPlotWidget_imag.underMouse()
        mouse_in_real = self.ui.pgPlotWidget_real.underMouse()
        msgBox = QMessageBox()

        if self.ui.actionAdd_Peak.isChecked():
            if mouse_in_imag:
                self.addPeak(data_pos)
                self.ui.actionAdd_Peak.setChecked(False)
            else:
                msgBox.setText("Click in imaginary part")
                msgBox.exec_()

        if self.ui.actionAdd_Cond.isChecked():
            if mouse_in_imag:
                self.addCond(data_pos)
                self.ui.actionAdd_Cond.setChecked(False)
            else:
                msgBox.setText("Click in imaginary part")
                msgBox.exec_()

        if self.ui.actionYAFF.isChecked():
            if mouse_in_imag:
                self.addYaff(data_pos)
                self.ui.actionYAFF.setChecked(False)
            else:
                msgBox.setText("Click in imaginary part")
                msgBox.exec_()

        if self.ui.actionAdd_PowerLaw.isChecked():
            if mouse_in_imag:
                self.addPowerComplex(data_pos)
                self.ui.actionAdd_PowerLaw.setChecked(False)
            else:
                msgBox.setText("Click in imaginary part")
                msgBox.exec_()

        if self.ui.actionAdd_Eps_Infty.isChecked():
            if mouse_in_real:
                self.addEpsInfty(data_pos)
                self.ui.actionAdd_Eps_Infty.setChecked(False)
            else:
                msgBox.setText("Click in real part")
                msgBox.exec_()


    def abortFit(self):
        self._fit_thread.quit()

    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:
            f = open("fitresults.log", "a")


        # prepare header
        header="# T        "
        pars = []
        bname = os.path.splitext(self.filepath)[0]
        for i_fcn, fcn in enumerate(self.function_registry.get_registered_functions()):
            for name in fcn.widget.names: # get variable names
                header += "{n:11}{n_sd:11}".format(n=name, n_sd=name+"_sd")

            # write for each function extra file
            name_fcn = "%s_%i.fit"%(bname,i_fcn)
            f_fcn = open(name_fcn, 'w')
            f_fcn.write("# %s\n"%(fcn.id_string))
            f_fcn.flush()
            np.savetxt(f_fcn, fcn.resampleData(self.data.frequency))
            f_fcn.close()
            for i,par in enumerate(fcn._beta): # params # TODO: ughh
                if fcn._selector_mask is not None:
                    if fcn._selector_mask[i]:
                        pars.extend([par])
                        pars.extend([fcn._sd_beta[i]])
                else:
                    pars.extend([par])
                    pars.extend([fcn._sd_beta[i]])

        header += "%-11s%-11s\n"%("fit_xlow","fit_xhigh")

        # write new header if fit model changed
        if self._last_written_header != header:
            f.write(header)
            f.flush()
            self._last_written_header = header
        else:
            pass

        pars.insert(0, self.data.meta["T"])
        pars.append(self.data.fit_limits[0])
        pars.append(self.data.fit_limits[1])
        pars = np.array([pars])
        np.savetxt(f, pars, fmt = '%-10.3e', delimiter=" ")
        f.close()

    def saveFitFigure(self):
        fig = pyplot.figure(figsize=(3.54*1.4, 2.75*1.4))

        font = {'family' : 'sans serif',
                'weight' : 'normal',
                'size'   : 9}

        matplotlib.rc('font', **font)
        pyplot.grid(linestyle="solid",alpha=0.3,  color="0.5")

        pyplot.loglog(self.data.frequency, self.data.epsilon.imag, 'bo', markersize=4, label="Data")
        pyplot.loglog(self.data.frequency_fit, self.data.epsilon_fit.imag, 'r-', lw=1.2, label="Fit")

        for fcn in self.function_registry.get_registered_functions():
            f,eps = fcn.get_data()
            label = fcn.id_label
            color = hex2color(str(fcn.color.name()))
            pyplot.loglog(f,eps[1], ls=":", color=color, lw=1, dashes=(1,1), label=label)

        for i in (0,1): pyplot.axvline(x=self.data.fit_limits[i], color='b', ls="-", lw=0.5)
        pyplot.legend(title = "T=%.1f K"%(self.data.meta["T"]))
        pyplot.xlabel('f/Hz')
        pyplot.ylabel(u'ε"')
        pyplot.ylim(self.data.epsilon.imag.min(), self.data.epsilon.imag.max() )
        #pyplot.savefig(os.path.splitext(self.filepath)[0]+".png")
        pyplot.savefig(os.path.splitext(self.filepath)[0]+".pdf")
        fig.clear()


    def addYaff(self, pos):
        _yaff = YAFF(plt_real=self.ui.pgPlotWidget_real,
                     plt_imag=self.ui.pgPlotWidget_imag,
                     limits=self.data.fit_limits)
        _yaff.blockSignals(True)
        _yaff.changedData.connect(self.updatePlot)
        _yaff.removeObj.connect(self.delParamterObject)
        gg_y = 10**pos.y()*2
        gg_x = 1/(10**pos.x()*2*np.pi)
        yaff_par = [ gg_y, gg_x , 20.0, 1.0, 0.5, gg_x/100, 1.0, 1.0]
        _yaff.setParameter(beta=yaff_par)
        self.parameterWidget.add(_yaff.widget)
        self.function_registry.register_function(_yaff)
        self.updatePlot()
        _yaff.blockSignals(False)


    def addCond(self, pos):
        _conductivity = Conductivity(plt_real=self.ui.pgPlotWidget_real,
                                     plt_imag=self.ui.pgPlotWidget_imag,
                                     limits=self.data.fit_limits)
        _conductivity.blockSignals(True)
        _conductivity.changedData.connect(self.updatePlot)
        _conductivity.removeObj.connect(self.delParamterObject)
        cond_par = [0.0, 10**(pos.y() + pos.x())*2*np.pi , 1.0]
        _conductivity.setParameter(beta=cond_par)
        self.parameterWidget.add(_conductivity.widget)
        self.function_registry.register_function(_conductivity) ##todo
        self.updatePlot()
        _conductivity.blockSignals(False)


    def addPowerComplex(self, pos):
        _power_complex = PowerComplex(plt_imag=self.ui.pgPlotWidget_imag,
                                      plt_real=self.ui.pgPlotWidget_real,
                                      limits=self.data.fit_limits)
        _power_complex.changedData.connect(self.updatePlot)
        _power_complex.removeObj.connect(self.delParamterObject)
        cond_par = [10**(pos.y() + pos.x())*2*np.pi , 1.0]
        _power_complex.setParameter(beta=cond_par)
        self.parameterWidget.add(_power_complex.widget)
        self.function_registry.register_function(_power_complex)
        self.updatePlot()

    def addEpsInfty(self, pos):
        _eps_infty = Static(plt_imag=self.ui.pgPlotWidget_imag,
                            plt_real=self.ui.pgPlotWidget_real,
                            limits=self.data.fit_limits)
        _eps_infty.changedData.connect(self.updatePlot)
        _eps_infty.removeObj.connect(self.delParamterObject)
        cond_par = [10**pos.y()]
        _eps_infty.setParameter(beta=cond_par)
        self.parameterWidget.add(_eps_infty.widget)
        self.function_registry.register_function(_eps_infty)
        self.updatePlot()

    def delParamterObject(self, obj):
        print "unregister",obj
        self.function_registry.unregister_function(obj)
        self.updatePlot()

    def addPeak(self, pos):
        id_list = [ key.id_num  for key in
                    self.function_registry.get_registered_functions().keys()
                    if key.id_label == 'hn']
        self.peakId = 1
        while self.peakId in id_list:
            self.peakId += 1
        _peak = Peak(id_num=self.peakId,
                     plt_real=self.ui.pgPlotWidget_real,
                     plt_imag=self.ui.pgPlotWidget_imag,
                     limits=self.data.fit_limits)
        _peak.changedData.connect(self.updatePlot)
        _peak.removeObj.connect(self.delParamterObject)
        new_peak = [2*10**pos.y(), 1 / (2*np.pi*10**pos.x()), 1, 1]
        _peak.setParameter(beta = new_peak)
        self.function_registry.register_function(_peak)
        self.parameterWidget.add(_peak.widget)
        self.updatePlot()

    def fitData_start(self, method):
        print method
        #fit_methods = [fit_odr_cmplx, fit_odr_imag, fit_lbfgsb, fit_anneal]

        fit_method = [
            self._fit_method.fit_odr_cmplx,
            self._fit_method.fit_odr_imag,
            ][method]

        # build function list
        p0,funcs,fixed_params = [],[],[]
        for fcn in self.function_registry.get_registered_functions():
            p0.extend(fcn.getParameter())
            funcs.append(fcn)
            fixed_params.extend(fcn.getFixed())
            fcn.clearData()
        _freq, _fit = self.data.get_data()

        if not self._fit_thread.isRunning():
            #self._fit_method.fit_odr_cmplx(_freq, _fit, p0, fixed_params, funcs)
            fit_method(_freq, _fit, p0, fixed_params, funcs)
            self._fit_thread.start()
            self.ui.statusbar.showMessage("Fitting ...")
        else:
            self.ui.statusbar.showMessage("Still fitting ...")

    def fitData_update(self):
        self._fit_thread.quit()
        odr_result = self._fit_method.result()
        p0,funcs,fixed_params = [],[],[]
        for fcn in self.function_registry.get_registered_functions():
            p0.extend(fcn.getParameter())
            funcs.append(fcn)
            fixed_params.extend(fcn.getFixed())

        self.data.set_fit(odr_result.beta, funcs)
        self.ui.statusbar.showMessage(" ".join(odr_result.stopreason))
        for i,fcn in enumerate(self.function_registry.get_registered_functions()):
            num_p = len(fcn.getParameter())
            beta = odr_result.beta[i:num_p+i]
            sd_beta = odr_result.sd_beta[i:num_p+i]
            fcn.setParameter(beta, sd_beta)

    def getFileNames(self):
        tmp = QFileDialog.getOpenFileNames(self, "Open file", "", '*.dat *.TXT')
        if len(tmp) != 0:
            self._file_paths = tmp
        self._current_file_index = 0
        path = unicode(self._file_paths[self._current_file_index])
        self.openFile(path)

    def nextFile(self):
        if len(self._file_paths) > self._current_file_index+1: # wrap around
            self._current_file_index += 1
        else:
            self._current_file_index = 0
        path = unicode(self._file_paths[self._current_file_index])
        self.openFile(path)

    def previousFile(self):
        if self._current_file_index == 0: # wrap around
            self._current_file_index = len(self._file_paths) - 1
        else:
            self._current_file_index -= 1
        path = unicode(self._file_paths[self._current_file_index])
        self.openFile(path)

    def openFile(self,path):
        print "opening: %s"%path
        self.filepath=path
        # TODO analyze file (LF,MF, HF) and act accordingly
        data = np.loadtxt(path, skiprows=4)
        self.setWindowTitle(os.path.basename(path))
        numpat = re.compile('\d+\.\d+')
        try:
            Temp = None
            for line in open(path).readlines():
                if re.search("Fixed", line) or re.search("Temp", line):
                    print "Found line containing 'Fixed' or 'Temp':"
                    print line
                    Temp = float(re.search(numpat, line).group())
                    print "Temperature found in file:", Temp
                    break
            if Temp == None: raise ValueError
        except:
            Temp = QInputDialog.getDouble(self, "No temperature found in data set", "Temperature/K:", value=0.00)[0]
            # mask the data to values > 0 (loglog plot)
        mask = (data[:, 1] > 0) & (data[:, 2] > 0) #& (data[:,2]>1e-3) & (data[:,0] > 1e-2)
        _freq = data[mask, 0]
        _die_stor = data[mask, 1]
        _die_loss = data[mask, 2]
        self.data.set_data(_freq, _die_stor, _die_loss)
        self.data.meta["T"] = Temp
        self.fit_boundary_imag.setRegion([np.log10(_freq.min()), np.log10(_freq.max())])
        self.ui.pgPlotWidget_imag.enableAutoRange()
        self.ui.pgPlotWidget_real.enableAutoRange()
        self.updatePlot()
        self.ui.pgPlotWidget_imag.disableAutoRange()
        self.ui.pgPlotWidget_real.disableAutoRange()


    def updatePlot(self):
        log10fmin, log10fmax = self.fit_boundary_imag.getRegion()
        self.data.set_fit_xlimits(10**log10fmin, 10**log10fmax)

        p0,funcs = [],[]
        for fcn in self.function_registry.get_registered_functions():
            p0.extend(fcn.getParameter())
            funcs.append(fcn)
        # calculate parametrized curve
        self.data.set_fit(p0, funcs)

        # replot data and fit, TODO: replot only if measurement data changed
        self.data.data_curve_real.setData(self.data.frequency, self.data.epsilon.real)
        self.data.data_curve_imag.setData(self.data.frequency, self.data.epsilon.imag)

        if len(funcs) > 0:
            self.data.fitted_curve_real.setData(self.data.frequency_fit, self.data.epsilon_fit.real)
            self.data.fitted_curve_imag.setData(self.data.frequency_fit, self.data.epsilon_fit.imag)
        else:
            self.data.fitted_curve_real.setData([np.nan],[np.nan])
            self.data.fitted_curve_imag.setData([np.nan],[np.nan])


    def updateIntermediatePlot(self, freq, intermediate_data):
        self.data.fitted_curve_real.setData(freq, intermediate_data[0])
        self.data.fitted_curve_imag.setData(freq, intermediate_data[1])

    def _update_fit_boundary_real(self):
        self.fit_boundary_real.setRegion(self.fit_boundary_imag.getRegion())

    def _update_fit_boundary_imag(self):
        self.fit_boundary_imag.setRegion(self.fit_boundary_real.getRegion())

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.Yes) == QMessageBox.Yes:
        QApplication.quit()


if __name__ == '__main__':
    signal.signal(signal.SIGINT, sigint_handler)
    files = sys.argv[1:]
    app = QApplication(sys.argv)
    timer = QTimer()
    timer.start(1000)  # Check every second for Strg-c on Cmd line
    timer.timeout.connect(lambda: None)
    main = AppWindow(files=files)
    main.showMaximized()
    main.raise_()
    sys.exit(app.exec_())