PyQtGraph - 绘图窗口

在本文中，我们将看到如何在 PyQtGraph 模块中创建绘图窗口。 PyQtGraph 是一个用于Python的图形和用户界面库，它提供了设计和科学应用程序中通常需要的功能。它的主要目标是提供用于显示数据（绘图、视频等）的快速交互式图形，其次是提供有助于快速应用程序开发的工具（例如，Qt Designer 中使用的属性树）。
绘图窗口由两个主要部分组成：包含实际绘制图形的绘图面板（默认位于顶部）和控制面板（默认位于底部）。控制面板是您配置将要绘制的内容的地方。对于一个简单的散点图，它可能只是选择要相互绘制哪些列的情况，但它可以变得非常详细。

In order to do this we use plot method with the pyqtgraph
Syntax : pg.plot() 
Argument : It takes no argument
Return : It returns PlotWindow object 
 

下面是实现

Python3

# importing pyqtgraph as pg
import pyqtgraph as pg
 
# importing QtCore and QtGui from the pyqtgraph module
from pyqtgraph.Qt import QtCore, QtGui
 
# importing numpy as np
import numpy as np
 
# define the data
title = "GeeksforGeeks PyQtGraph"
 
# y values to plot by line 1
y = [2, 8, 6, 8, 6, 11, 14, 13, 18, 19]
 
# y values to plot by line 2
y2 = [3, 1, 5, 8, 9, 11, 16, 17, 14, 16]
x = range(0, 10)
 
# create plot window object
plt = pg.plot()
 
# showing x and y grids
plt.showGrid(x = True, y = True)
 
# adding legend
plt.addLegend()
 
# set properties of the label for y axis
plt.setLabel('left', 'Vertical Values', units ='y')
 
# set properties of the label for x axis
plt.setLabel('bottom', 'Horizontal Values', units ='s')
 
# setting horizontal range
plt.setXRange(0, 10)
 
# setting vertical range
plt.setYRange(0, 20)
 
# setting window title
plt.setWindowTitle(title)
 
# ploting line in green color
line1 = plt.plot(x, y, pen ='g', symbol ='x', symbolPen ='g',
                           symbolBrush = 0.2, name ='green')
 
# ploting line2 with blue color
line2 = plt.plot(x, y2, pen ='b', symbol ='o', symbolPen ='b',
                             symbolBrush = 0.2, name ='blue')
 
 
 
# main method
if __name__ == '__main__':
     
    # importing system
    import sys
     
    # Start Qt event loop unless running in interactive mode or using
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()

输出 ：