git.gag.com Git - debian/gnuradio/blob - gr-utils/src/python/gr_filter_design.py

   1 #!/usr/bin/env python
   2
   3 try:
   4     import scipy
   5     from scipy import fftpack
   6 except ImportError:
   7     print "Please install SciPy to run this script (http://www.scipy.org/)"
   8     raise SystemExit, 1
   9
  10 import sys, os
  11 from PyQt4 import Qt, QtCore, QtGui
  12 import PyQt4.Qwt5 as Qwt
  13 from optparse import OptionParser
  14 from gnuradio import gr, blks2, eng_notation
  15 from scipy import fftpack
  16
  17 from pyqt_filter import Ui_MainWindow
  18
  19 class gr_plot_filter(QtGui.QMainWindow):
  20     def __init__(self, qapp, options):
  21         QtGui.QWidget.__init__(self, None)
  22         self.gui = Ui_MainWindow()
  23         self.gui.setupUi(self)
  24
  25         self.connect(self.gui.filterTypeComboBox,
  26                      Qt.SIGNAL("currentIndexChanged(const QString&)"),
  27                      self.changed_filter_type)
  28         self.connect(self.gui.filterDesignTypeComboBox,
  29                      Qt.SIGNAL("currentIndexChanged(const QString&)"),
  30                      self.changed_filter_design_type)
  31
  32         self.connect(self.gui.designButton,
  33                      Qt.SIGNAL("released()"),
  34                      self.design)
  35
  36         self.connect(self.gui.tabGroup,
  37                      Qt.SIGNAL("currentChanged(int)"),
  38                      self.tab_changed)
  39
  40         self.connect(self.gui.nfftEdit,
  41                      Qt.SIGNAL("textEdited(QString)"),
  42                      self.nfft_edit_changed)
  43
  44         self.gui.designButton.setShortcut(QtCore.Qt.Key_Return)
  45
  46         self.taps = []
  47         self.fftdB = []
  48         self.fftDeg = []
  49         self.groupDelay = []
  50         self.nfftpts = int(10000)
  51         self.gui.nfftEdit.setText(Qt.QString("%1").arg(self.nfftpts))
  52
  53         self.gui.lpfPassBandRippleLabel.setVisible(False)
  54         self.gui.lpfPassBandRippleEdit.setVisible(False)
  55         self.gui.bpfPassBandRippleLabel.setVisible(False)
  56         self.gui.bpfPassBandRippleEdit.setVisible(False)
  57         self.gui.bnfPassBandRippleLabel.setVisible(False)
  58         self.gui.bnfPassBandRippleEdit.setVisible(False)
  59         self.gui.hpfPassBandRippleLabel.setVisible(False)
  60         self.gui.hpfPassBandRippleEdit.setVisible(False)
  61
  62         # Initialize to LPF
  63         self.gui.filterTypeWidget.setCurrentWidget(self.gui.firlpfPage)
  64
  65         # Set Axis labels
  66         self.gui.freqPlot.setAxisTitle(self.gui.freqPlot.xBottom,
  67                                        "Frequency (Hz)")
  68         self.gui.freqPlot.setAxisTitle(self.gui.freqPlot.yLeft,
  69                                        "Magnitude (dB)")
  70         self.gui.timePlot.setAxisTitle(self.gui.timePlot.xBottom,
  71                                        "Tap number")
  72         self.gui.timePlot.setAxisTitle(self.gui.timePlot.yLeft,
  73                                        "Amplitude")
  74         self.gui.phasePlot.setAxisTitle(self.gui.phasePlot.xBottom,
  75                                         "Frequency (Hz)")
  76         self.gui.phasePlot.setAxisTitle(self.gui.phasePlot.yLeft,
  77                                         "Phase (Radians)")
  78         self.gui.groupPlot.setAxisTitle(self.gui.groupPlot.xBottom,
  79                                         "Frequency (Hz)")
  80         self.gui.groupPlot.setAxisTitle(self.gui.groupPlot.yLeft,
  81                                         "Delay (sec)")
  82
  83         # Set up plot curves
  84         self.rcurve = Qwt.QwtPlotCurve("Real")
  85         self.rcurve.attach(self.gui.timePlot)
  86         self.icurve = Qwt.QwtPlotCurve("Imag")
  87         self.icurve.attach(self.gui.timePlot)
  88
  89         self.freqcurve = Qwt.QwtPlotCurve("PSD")
  90         self.freqcurve.attach(self.gui.freqPlot)
  91
  92         self.phasecurve = Qwt.QwtPlotCurve("Phase")
  93         self.phasecurve.attach(self.gui.phasePlot)
  94
  95         self.groupcurve = Qwt.QwtPlotCurve("Group Delay")
  96         self.groupcurve.attach(self.gui.groupPlot)
  97
  98         # Create zoom functionality for the plots
  99         self.timeZoomer = Qwt.QwtPlotZoomer(self.gui.timePlot.xBottom,
 100                                             self.gui.timePlot.yLeft,
 101                                             Qwt.QwtPicker.PointSelection,
 102                                             Qwt.QwtPicker.AlwaysOn,
 103                                             self.gui.timePlot.canvas())
 104
 105         self.freqZoomer = Qwt.QwtPlotZoomer(self.gui.freqPlot.xBottom,
 106                                             self.gui.freqPlot.yLeft,
 107                                             Qwt.QwtPicker.PointSelection,
 108                                             Qwt.QwtPicker.AlwaysOn,
 109                                             self.gui.freqPlot.canvas())
 110
 111         self.phaseZoomer = Qwt.QwtPlotZoomer(self.gui.phasePlot.xBottom,
 112                                              self.gui.phasePlot.yLeft,
 113                                              Qwt.QwtPicker.PointSelection,
 114                                              Qwt.QwtPicker.AlwaysOn,
 115                                              self.gui.phasePlot.canvas())
 116
 117         self.groupZoomer = Qwt.QwtPlotZoomer(self.gui.groupPlot.xBottom,
 118                                              self.gui.groupPlot.yLeft,
 119                                              Qwt.QwtPicker.PointSelection,
 120                                              Qwt.QwtPicker.AlwaysOn,
 121                                              self.gui.groupPlot.canvas())
 122
 123         # Set up pen for colors and line width
 124         blue = QtGui.qRgb(0x00, 0x00, 0xFF)
 125         blueBrush = Qt.QBrush(Qt.QColor(blue))
 126         self.freqcurve.setPen(Qt.QPen(blueBrush, 2))
 127         self.rcurve.setPen(Qt.QPen(blueBrush, 2))
 128         self.phasecurve.setPen(Qt.QPen(blueBrush, 2))
 129         self.groupcurve.setPen(Qt.QPen(blueBrush, 2))
 130
 131         self.filterWindows = {"Hamming Window" : gr.firdes.WIN_HAMMING,
 132                               "Hann Window" : gr.firdes.WIN_HANN,
 133                               "Blackman Window" : gr.firdes.WIN_BLACKMAN,
 134                               "Rectangular Window" : gr.firdes.WIN_RECTANGULAR,
 135                               "Kaiser Window" : gr.firdes.WIN_KAISER,
 136                               "Blackman-harris Window" : gr.firdes.WIN_BLACKMAN_hARRIS}
 137
 138         self.show()
 139
 140     def changed_filter_type(self, ftype):
 141         strftype = str(ftype.toAscii())
 142         if(ftype == "Low Pass"):
 143             self.gui.filterTypeWidget.setCurrentWidget(self.gui.firlpfPage)
 144         elif(ftype == "Band Pass"):
 145             self.gui.filterTypeWidget.setCurrentWidget(self.gui.firbpfPage)
 146         elif(ftype == "Complex Band Pass"):
 147             self.gui.filterTypeWidget.setCurrentWidget(self.gui.firbpfPage)
 148         elif(ftype == "Band Notch"):
 149             self.gui.filterTypeWidget.setCurrentWidget(self.gui.firbnfPage)
 150         elif(ftype == "High Pass"):
 151             self.gui.filterTypeWidget.setCurrentWidget(self.gui.firhpfPage)
 152         elif(ftype == "Root Raised Cosine"):
 153             self.gui.filterTypeWidget.setCurrentWidget(self.gui.rrcPage)
 154         elif(ftype == "Gaussian"):
 155             self.gui.filterTypeWidget.setCurrentWidget(self.gui.gausPage)
 156
 157         self.design()
 158
 159     def changed_filter_design_type(self, design):
 160         if(design == "Equiripple"):
 161             self.set_equiripple()
 162         else:
 163             self.set_windowed()
 164
 165         self.design()
 166
 167     def set_equiripple(self):
 168         self.equiripple = True
 169         self.gui.lpfPassBandRippleLabel.setVisible(True)
 170         self.gui.lpfPassBandRippleEdit.setVisible(True)
 171         self.gui.bpfPassBandRippleLabel.setVisible(True)
 172         self.gui.bpfPassBandRippleEdit.setVisible(True)
 173         self.gui.bnfPassBandRippleLabel.setVisible(True)
 174         self.gui.bnfPassBandRippleEdit.setVisible(True)
 175         self.gui.hpfPassBandRippleLabel.setVisible(True)
 176         self.gui.hpfPassBandRippleEdit.setVisible(True)
 177
 178     def set_windowed(self):
 179         self.equiripple = False
 180         self.gui.lpfPassBandRippleLabel.setVisible(False)
 181         self.gui.lpfPassBandRippleEdit.setVisible(False)
 182         self.gui.bpfPassBandRippleLabel.setVisible(False)
 183         self.gui.bpfPassBandRippleEdit.setVisible(False)
 184         self.gui.bnfPassBandRippleLabel.setVisible(False)
 185         self.gui.bnfPassBandRippleEdit.setVisible(False)
 186         self.gui.hpfPassBandRippleLabel.setVisible(False)
 187         self.gui.hpfPassBandRippleEdit.setVisible(False)
 188
 189     def design(self):
 190         ret = True
 191         fs,r = self.gui.sampleRateEdit.text().toDouble()
 192         ret = r and ret
 193         gain,r = self.gui.filterGainEdit.text().toDouble()
 194         ret = r and ret
 195
 196         if(ret):
 197             winstr = str(self.gui.filterDesignTypeComboBox.currentText().toAscii())
 198             ftype = str(self.gui.filterTypeComboBox.currentText().toAscii())
 199
 200             if(winstr == "Equiripple"):
 201                 designer = {"Low Pass" : self.design_opt_lpf,
 202                             "Band Pass" : self.design_opt_bpf,
 203                             "Complex Band Pass" : self.design_opt_cbpf,
 204                             "Band Notch" : self.design_opt_bnf,
 205                             "High Pass" :  self.design_opt_hpf}
 206                 taps,r = designer[ftype](fs, gain)
 207
 208             else:
 209                 designer = {"Low Pass" : self.design_win_lpf,
 210                             "Band Pass" : self.design_win_bpf,
 211                             "Complex Band Pass" : self.design_win_cbpf,
 212                             "Band Notch" : self.design_win_bnf,
 213                             "High Pass" :  self.design_win_hpf,
 214                             "Root Raised Cosine" :  self.design_win_rrc,
 215                             "Gaussian" :  self.design_win_gaus}
 216                 wintype = self.filterWindows[winstr]
 217                 taps,r = designer[ftype](fs, gain, wintype)
 218
 219             if(r):
 220                 print "Number of taps: ", len(taps)
 221
 222                 self.taps = scipy.array(taps)
 223                 self.get_fft(fs, self.taps, self.nfftpts)
 224                 self.update_time_curves()
 225                 self.update_freq_curves()
 226                 self.update_phase_curves()
 227                 self.update_group_curves()
 228
 229     # Filter design functions using a window
 230     def design_win_lpf(self, fs, gain, wintype):
 231         ret = True
 232         pb,r = self.gui.endofLpfPassBandEdit.text().toDouble()
 233         ret = r and ret
 234         sb,r = self.gui.startofLpfStopBandEdit.text().toDouble()
 235         ret = r and ret
 236         atten,r = self.gui.lpfStopBandAttenEdit.text().toDouble()
 237         ret = r and ret
 238
 239         if(ret):
 240             tb = sb - pb
 241
 242             taps = gr.firdes.low_pass_2(gain, fs, pb, tb,
 243                                         atten, wintype)
 244             return (taps, ret)
 245         else:
 246             return ([], ret)
 247
 248     def design_win_bpf(self, fs, gain, wintype):
 249         ret = True
 250         pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
 251         ret = r and ret
 252         pb2,r = self.gui.endofBpfPassBandEdit.text().toDouble()
 253         ret = r and ret
 254         tb,r  = self.gui.bpfTransitionEdit.text().toDouble()
 255         ret = r and ret
 256         atten,r = self.gui.bpfStopBandAttenEdit.text().toDouble()
 257         ret = r and ret
 258
 259         if(r):
 260             taps = gr.firdes.band_pass_2(gain, fs, pb1, pb2, tb,
 261                                          atten, wintype)
 262             return (taps,r)
 263         else:
 264             return ([],r)
 265
 266     def design_win_cbpf(self, fs, gain, wintype):
 267         ret = True
 268         pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
 269         ret = r and ret
 270         pb2,r = self.gui.endofBpfPassBandEdit.text().toDouble()
 271         ret = r and ret
 272         tb,r  = self.gui.bpfTransitionEdit.text().toDouble()
 273         ret = r and ret
 274         atten,r = self.gui.bpfStopBandAttenEdit.text().toDouble()
 275         ret = r and ret
 276
 277         if(r):
 278             taps = gr.firdes.complex_band_pass_2(gain, fs, pb1, pb2, tb,
 279                                                  atten, wintype)
 280             return (taps,r)
 281         else:
 282             return ([],r)
 283
 284     def design_win_bnf(self, fs, gain, wintype):
 285         ret = True
 286         pb1,r = self.gui.startofBnfStopBandEdit.text().toDouble()
 287         ret = r and ret
 288         pb2,r = self.gui.endofBnfStopBandEdit.text().toDouble()
 289         ret = r and ret
 290         tb,r  = self.gui.bnfTransitionEdit.text().toDouble()
 291         ret = r and ret
 292         atten,r = self.gui.bnfStopBandAttenEdit.text().toDouble()
 293         ret = r and ret
 294
 295         if(r):
 296             taps = gr.firdes.band_reject_2(gain, fs, pb1, pb2, tb,
 297                                            atten, wintype)
 298             return (taps,r)
 299         else:
 300             return ([],r)
 301
 302     def design_win_hpf(self, fs, gain, wintype):
 303         ret = True
 304         sb,r = self.gui.endofHpfStopBandEdit.text().toDouble()
 305         ret = r and ret
 306         pb,r = self.gui.startofHpfPassBandEdit.text().toDouble()
 307         ret = r and ret
 308         atten,r = self.gui.hpfStopBandAttenEdit.text().toDouble()
 309         ret = r and ret
 310
 311         if(r):
 312             tb = pb - sb
 313             taps = gr.firdes.high_pass_2(gain, fs, pb, tb,
 314                                          atten, wintype)
 315             return (taps,r)
 316         else:
 317             return ([],r)
 318
 319     def design_win_rrc(self, fs, gain, wintype):
 320         ret = True
 321         sr,r = self.gui.rrcSymbolRateEdit.text().toDouble()
 322         ret = r and ret
 323         alpha,r = self.gui.rrcAlphaEdit.text().toDouble()
 324         ret = r and ret
 325         ntaps,r = self.gui.rrcNumTapsEdit.text().toInt()
 326         ret = r and ret
 327
 328         if(r):
 329             taps = gr.firdes.root_raised_cosine(gain, fs, sr,
 330                                                 alpha, ntaps)
 331             return (taps,r)
 332         else:
 333             return ([],r)
 334
 335     def design_win_gaus(self, fs, gain, wintype):
 336         ret = True
 337         sr,r = self.gui.gausSymbolRateEdit.text().toDouble()
 338         ret = r and ret
 339         bt,r = self.gui.gausBTEdit.text().toDouble()
 340         ret = r and ret
 341         ntaps,r = self.gui.gausNumTapsEdit.text().toInt()
 342         ret = r and ret
 343
 344         if(r):
 345             spb = fs / sr
 346             taps = gr.firdes.gaussian(gain, spb, bt, ntaps)
 347             return (taps,r)
 348         else:
 349             return ([],r)
 350
 351     # Design Functions for Equiripple Filters
 352     def design_opt_lpf(self, fs, gain):
 353         ret = True
 354         pb,r = self.gui.endofLpfPassBandEdit.text().toDouble()
 355         ret = r and ret
 356         sb,r = self.gui.startofLpfStopBandEdit.text().toDouble()
 357         ret = r and ret
 358         atten,r = self.gui.lpfStopBandAttenEdit.text().toDouble()
 359         ret = r and ret
 360         ripple,r = self.gui.lpfPassBandRippleEdit.text().toDouble()
 361         ret = r and ret
 362
 363         if(ret):
 364             taps = blks2.optfir.low_pass(gain, fs, pb, sb,
 365                                          ripple, atten)
 366             return (taps, ret)
 367         else:
 368             return ([], ret)
 369
 370     def design_opt_bpf(self, fs, gain):
 371         ret = True
 372         pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
 373         ret = r and ret
 374         pb2,r = self.gui.endofBpfPassBandEdit.text().toDouble()
 375         ret = r and ret
 376         tb,r  = self.gui.bpfTransitionEdit.text().toDouble()
 377         ret = r and ret
 378         atten,r = self.gui.bpfStopBandAttenEdit.text().toDouble()
 379         ret = r and ret
 380         ripple,r = self.gui.bpfPassBandRippleEdit.text().toDouble()
 381         ret = r and ret
 382
 383         if(r):
 384             sb1 = pb1 - tb
 385             sb2 = pb2 + tb
 386             taps = blks2.optfir.band_pass(gain, fs, sb1, pb1, pb2, sb2,
 387                                           ripple, atten)
 388             return (taps,r)
 389         else:
 390             return ([],r)
 391
 392     def design_opt_cbpf(self, fs, gain):
 393         ret = True
 394         pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
 395         ret = r and ret
 396         pb2,r = self.gui.endofBpfPassBandEdit.text().toDouble()
 397         ret = r and ret
 398         tb,r  = self.gui.bpfTransitionEdit.text().toDouble()
 399         ret = r and ret
 400         atten,r = self.gui.bpfStopBandAttenEdit.text().toDouble()
 401         ret = r and ret
 402         ripple,r = self.gui.bpfPassBandRippleEdit.text().toDouble()
 403         ret = r and ret
 404
 405         if(r):
 406             sb1 = pb1 - tb
 407             sb2 = pb2 + tb
 408             taps = blks2.optfir.complex_band_pass(gain, fs, sb1, pb1, pb2, sb2,
 409                                                   ripple, atten)
 410             return (taps,r)
 411         else:
 412             return ([],r)
 413
 414     def design_opt_bnf(self, fs, gain):
 415         ret = True
 416         sb1,r = self.gui.startofBnfStopBandEdit.text().toDouble()
 417         ret = r and ret
 418         sb2,r = self.gui.endofBnfStopBandEdit.text().toDouble()
 419         ret = r and ret
 420         tb,r  = self.gui.bnfTransitionEdit.text().toDouble()
 421         ret = r and ret
 422         atten,r = self.gui.bnfStopBandAttenEdit.text().toDouble()
 423         ret = r and ret
 424         ripple,r = self.gui.bnfPassBandRippleEdit.text().toDouble()
 425         ret = r and ret
 426
 427         if(r):
 428             pb1 = sb1 - tb
 429             pb2 = sb2 + tb
 430             taps = blks2.optfir.band_reject(gain, fs, pb1, sb1, sb2, pb2,
 431                                             ripple, atten)
 432             return (taps,r)
 433         else:
 434             return ([],r)
 435
 436     def design_opt_hpf(self, fs, gain):
 437         ret = True
 438         sb,r = self.gui.endofHpfStopBandEdit.text().toDouble()
 439         ret = r and ret
 440         pb,r = self.gui.startofHpfPassBandEdit.text().toDouble()
 441         ret = r and ret
 442         atten,r = self.gui.hpfStopBandAttenEdit.text().toDouble()
 443         ret = r and ret
 444         ripple,r = self.gui.hpfPassBandRippleEdit.text().toDouble()
 445         ret = r and ret
 446
 447         if(r):
 448             taps = blks2.optfir.high_pass(gain, fs, sb, pb,
 449                                           atten, ripple)
 450             return (taps,r)
 451         else:
 452             return ([],r)
 453
 454     def nfft_edit_changed(self, nfft):
 455         infft,r = nfft.toInt()
 456         if(r and (infft != self.nfftpts)):
 457             self.nfftpts = infft
 458             self.update_freq_curves()
 459
 460     def tab_changed(self, tab):
 461         if(tab == 0):
 462             self.update_freq_curves()
 463         if(tab == 1):
 464             self.update_time_curves()
 465         if(tab == 2):
 466             self.update_phase_curves()
 467         if(tab == 3):
 468             self.update_group_curves()
 469
 470     def get_fft(self, fs, taps, Npts):
 471         Ts = 1.0/fs
 472         fftpts = fftpack.fft(taps, Npts)
 473         self.freq = scipy.arange(0, fs, 1.0/(Npts*Ts))
 474         self.fftdB = 20.0*scipy.log10(abs(fftpts))
 475         self.fftDeg = scipy.unwrap(scipy.angle(fftpts))
 476         self.groupDelay = -scipy.diff(self.fftDeg)
 477
 478     def update_time_curves(self):
 479         ntaps = len(self.taps)
 480         if(ntaps > 0):
 481             if(type(self.taps[0]) == scipy.complex128):
 482                 self.rcurve.setData(scipy.arange(ntaps), self.taps.real)
 483                 self.icurve.setData(scipy.arange(ntaps), self.taps.imag)
 484             else:
 485                 self.rcurve.setData(scipy.arange(ntaps), self.taps)
 486
 487             # Reset the x-axis to the new time scale
 488             ymax = 1.5 * max(self.taps)
 489             ymin = 1.5 * min(self.taps)
 490             self.gui.timePlot.setAxisScale(self.gui.timePlot.xBottom,
 491                                            0, ntaps)
 492             self.gui.timePlot.setAxisScale(self.gui.timePlot.yLeft,
 493                                            ymin, ymax)
 494
 495             # Set the zoomer base to unzoom to the new axis
 496             self.timeZoomer.setZoomBase()
 497
 498             self.gui.timePlot.replot()
 499
 500     def update_freq_curves(self):
 501         npts = len(self.fftdB)
 502         if(npts > 0):
 503             self.freqcurve.setData(self.freq, self.fftdB)
 504
 505             # Reset the x-axis to the new time scale
 506             ymax = 1.5 * max(self.fftdB[0:npts/2])
 507             ymin = 1.1 * min(self.fftdB[0:npts/2])
 508             xmax = self.freq[npts/2]
 509             xmin = self.freq[0]
 510             self.gui.freqPlot.setAxisScale(self.gui.freqPlot.xBottom,
 511                                            xmin, xmax)
 512             self.gui.freqPlot.setAxisScale(self.gui.freqPlot.yLeft,
 513                                            ymin, ymax)
 514
 515             # Set the zoomer base to unzoom to the new axis
 516             self.freqZoomer.setZoomBase()
 517
 518             self.gui.freqPlot.replot()
 519
 520
 521     def update_phase_curves(self):
 522         npts = len(self.fftDeg)
 523         if(npts > 0):
 524             self.phasecurve.setData(self.freq, self.fftDeg)
 525
 526             # Reset the x-axis to the new time scale
 527             ymax = 1.5 * max(self.fftDeg[0:npts/2])
 528             ymin = 1.1 * min(self.fftDeg[0:npts/2])
 529             xmax = self.freq[npts/2]
 530             xmin = self.freq[0]
 531             self.gui.phasePlot.setAxisScale(self.gui.phasePlot.xBottom,
 532                                             xmin, xmax)
 533             self.gui.phasePlot.setAxisScale(self.gui.phasePlot.yLeft,
 534                                             ymin, ymax)
 535
 536             # Set the zoomer base to unzoom to the new axis
 537             self.phaseZoomer.setZoomBase()
 538
 539             self.gui.phasePlot.replot()
 540
 541     def update_group_curves(self):
 542         npts = len(self.groupDelay)
 543         if(npts > 0):
 544             self.groupcurve.setData(self.freq, self.groupDelay)
 545
 546             # Reset the x-axis to the new time scale
 547             ymax = 1.5 * max(self.groupDelay[0:npts/2])
 548             ymin = 1.1 * min(self.groupDelay[0:npts/2])
 549             xmax = self.freq[npts/2]
 550             xmin = self.freq[0]
 551             self.gui.groupPlot.setAxisScale(self.gui.groupPlot.xBottom,
 552                                             xmin, xmax)
 553             self.gui.groupPlot.setAxisScale(self.gui.groupPlot.yLeft,
 554                                             ymin, ymax)
 555
 556             # Set the zoomer base to unzoom to the new axis
 557             self.groupZoomer.setZoomBase()
 558
 559             self.gui.groupPlot.replot()
 560
 561
 562 def setup_options():
 563     usage="%prog: [options] (input_filename)"
 564     description = ""
 565
 566     parser = OptionParser(conflict_handler="resolve",
 567                           usage=usage, description=description)
 568     return parser
 569
 570 def main(args):
 571     parser = setup_options()
 572     (options, args) = parser.parse_args ()
 573
 574     app = Qt.QApplication(args)
 575     gplt = gr_plot_filter(app, options)
 576     app.exec_()
 577
 578 if __name__ == '__main__':
 579     main(sys.argv)
 580