Python绘图库之pyqtgraph的用法详解

plot

设置plot的pen属性的几种方法，通过画笔可以设置绘制图像的颜色、线宽等参数：

• pen=(255,0,0)
• pen=pg.mkPen(color=‘b’, width=5)
• pen=pg.mkPen({‘color’:‘FF0’, ‘width’: 2})

import sys
import os

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

import pyqtgraph as pg
import numpy as np

pg.systemInfo()

data = np.random.normal(size=10000)
f1 = pg.plot(title='波形图1', y=data, pen=(255,0,0)) 
f1.setBackground('w')

f2 = pg.plot(title='波形图2', y=np.random.normal(size=50), pen=pg.mkPen(color='b', width=5))
f2.setBackground('g')

f3 = pg.plot(title='波形图3', y=np.random.normal(size=500),pen=pg.mkPen({'color':'FF0', 'width': 2}))
f3.setBackground('b')

if __name__ == "__main__":
    pg.QtGui.QGuiApplication.exec_()

每个plot绘制的波形图都是一个独立的应用程序窗口：

设置symbolBrush，symbolPen属性：

import sys
import numpy as np
import pyqtgraph as pg


pg.plot(np.random.normal(size=100), pen=(255, 255, 0),  symbolBrush=(0, 255, 0), symbolPen=(255, 0, 0))

if __name__ == "__main__":
    pg.QtGui.QGuiApplication.exec_()

image

import sys
import numpy as np
import pyqtgraph as pg

pg.image(np.random.normal(size=(500, 500)))

if __name__ == "__main__":
    pg.QtGui.QGuiApplication.exec_()

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