pyqtgraph/examples/histogram.py
Ogi Moore 4951bd743e
Replace main stanza with PyQt6 compatable variant (#1645)
* Replace main stanza with PyQt6 compatable variant

* Use fn.mkQApp instead

* remove needless comments
2021-03-22 11:17:12 -07:00

34 lines
1.1 KiB
Python

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