qdsfit/data.py

# -*- encoding: utf8 -*-
from PyQt4.QtGui import QColor
import numpy as np
import pyqtgraph as pg

from Mathlib import FitFunctionCreator



class Data:
    def __init__(self, frequency=np.zeros(1), die_real=np.zeros(1), die_imag=np.zeros(1)):
        self.frequency = frequency
        self.epsilon = die_real + 1j * die_imag
        self.frequency_fit = frequency
        self.epsilon_fit = die_real*0 + 1j * die_imag*0
        myPen_imag = pg.mkPen(width=3, color=(255,255,127))
        myPen_real = pg.mkPen(width=3, color=(51,255,127))

        self.data_curve_imag = pg.PlotDataItem(x=[np.nan], y=[np.nan],pen=QColor(0,0,0,0), symbol='o',
                                          symbolBrush=(255,127,0,127))
        self.data_curve_real = pg.PlotDataItem(x=[np.nan], y=[np.nan],pen=QColor(0,0,0,0), symbol='s',
                                          symbolBrush=(119,202,92,127))
        self.fitted_curve_imag = pg.PlotDataItem(np.array([np.nan]), np.array([np.nan]), pen=myPen_imag)
        self.fitted_curve_real = pg.PlotDataItem(np.array([np.nan]), np.array([np.nan]), pen=myPen_real)
        self.length = len(frequency)
        self.meta = dict()
        self.fit_limits = [frequency.min(), frequency.max(), die_imag.min(), die_imag.max()]

        self.fit_param = None
        self.fit_funcs = None # list of fit functions
        self.hide_funcs = None # remove these func from the data

    def set_fit(self, param, funcs):
        self.fit_funcs = funcs
        self.hide_funcs = []
        self.fit_param = param
        fit_real, fit_imag = FitFunctionCreator().fitfcn(param, self.frequency_fit, *funcs)
        self.epsilon_fit =  fit_real + 1j*fit_imag

    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_imag.setData(f,e_imag)
        self.data_curve_real.setData(f,e_real)

    def set_fit_xlimits(self, xmin, xmax):
        self.fit_limits[0] = xmin
        self.fit_limits[1] = xmax
        self.frequency_fit = self.frequency[(self.frequency <= xmax) & (self.frequency >= xmin)]

    def set_fit_ylimits(self, ymin, ymax):
        self.fit_limits[2] = ymin
        self.fit_limits[3] = ymax

    def get_data(self):
        #mask = np.ones(len(self.frequency), dtype='bool')
        mask = (self.frequency > self.fit_limits[0]) & (self.frequency < self.fit_limits[1])
        #mask &= (self.epsilon.imag > self.fit_limits[2]) & (self.epsilon.imag < self.fit_limits[3])
        return self.frequency[mask], self.epsilon[mask]

    def remove_curves(self):
        print "remove data_curve"
        #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()