Пример гистограммы в pyqtgraph

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
 
win = pg.GraphicsWindow()
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, 10, 40))
 
## Using stepMode=True causes the plot to draw two lines for each sample.
## notice that len(x) == len(y)+1
plt1.plot(x, y, stepMode=True, fillLevel=0, 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))
 
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
    import sys
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
 
 
win = pg.GraphicsWindow()
win.resize(800,350)
win.setWindowTitle('pyqtgraph example: Histogram')
plt1 = win.addPlot()
 
x = [1, 2, 3, 4, 5, 6, 7]
y = [1, 0.2, 3, 45, 5, 6]
 
 
plt1.plot(x, y, stepMode=True, fillLevel=0, brush=(0,0,255,150))
 
if __name__ == '__main__':
    import sys
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()