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Log scale and fft transform fix

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If the plotted data is fourier transformed and an x log scale is chosen, the first bin causes an error because np.log10(0) doesn't make any sense.
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mrussell 2015-07-06 16:21:06 +01:00
parent 2888546de6
commit 392d2a3475
1 changed files with 4 additions and 0 deletions
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4
pyqtgraph/graphicsItems/PlotDataItem.py
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@ -523,6 +523,10 @@ class PlotDataItem(GraphicsObject):
#y = y[::ds] #y = y[::ds]
if self.opts['fftMode']: if self.opts['fftMode']:
x,y = self._fourierTransform(x, y) x,y = self._fourierTransform(x, y)
# Ignore the first bin for fft data if we have a logx scale
if self.opts['logMode'][0]:
x=x[1:]
y=y[1:]
if self.opts['logMode'][0]: if self.opts['logMode'][0]:
x = np.log10(x) x = np.log10(x)
if self.opts['logMode'][1]: if self.opts['logMode'][1]: