34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
# -*- coding: utf-8 -*-
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"""
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In this example we draw two different kinds of histogram.
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"""
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import initExample ## Add path to library (just for examples; you do not need this)
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import pyqtgraph as pg
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from pyqtgraph.Qt import QtCore, QtGui
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import numpy as np
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win = pg.GraphicsLayoutWidget(show=True)
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win.resize(800,350)
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win.setWindowTitle('pyqtgraph example: Histogram')
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plt1 = win.addPlot()
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plt2 = win.addPlot()
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## make interesting distribution of values
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vals = np.hstack([np.random.normal(size=500), np.random.normal(size=260, loc=4)])
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## compute standard histogram
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y,x = np.histogram(vals, bins=np.linspace(-3, 8, 40))
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## Using stepMode="center" causes the plot to draw two lines for each sample.
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## notice that len(x) == len(y)+1
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plt1.plot(x, y, stepMode="center", fillLevel=0, fillOutline=True, brush=(0,0,255,150))
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## Now draw all points as a nicely-spaced scatter plot
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y = pg.pseudoScatter(vals, spacing=0.15)
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#plt2.plot(vals, y, pen=None, symbol='o', symbolSize=5)
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plt2.plot(vals, y, pen=None, symbol='o', symbolSize=5, symbolPen=(255,255,255,200), symbolBrush=(0,0,255,150))
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if __name__ == '__main__':
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pg.exec()
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