Python使用matplotlib实现交换式图形显示功能示例

from random import choice
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.widgets import RadioButtons,Button
t = np.arange(0.0,2.0,0.01)
s0 = np.sin(2*np.pi*t)
s1 = np.sin(4*np.pi*t)
s2 = np.sin(8*np.pi*t)
fig, ax = plt.subplots()
l,= ax.plot(t, s0, lw=2, color='red')
plt.subplots_adjust(left=0.3)
#定义允许的几种频率，并创建单选钮组件
#其中[0.05, 0.7, 0.15, 0.15]表示组件在窗口上的归一化位置
axcolor ='lightgoldenrodyellow'
rax = plt.axes([0.05,0.7,0.15,0.15], axisbg=axcolor)
radio =RadioButtons(rax,('2 Hz','4 Hz','8 Hz'))
hzdict ={'2 Hz': s0,'4 Hz': s1,'8 Hz': s2}
def hzfunc(label):
ydata = hzdict[label]
l.set_ydata(ydata)
plt.draw()
radio.on_clicked(hzfunc)
#定义允许的几种颜色，并创建单选钮组件
rax = plt.axes([0.05,0.4,0.15,0.15], axisbg=axcolor)
colors =('red','blue','green')
radio2 =RadioButtons(rax, colors)
def colorfunc(label):
l.set_color(label)
plt.draw()
radio2.on_clicked(colorfunc)
#定义允许的几种线型，并创建单选钮组件
rax = plt.axes([0.05,0.1,0.15,0.15], axisbg=axcolor)
styles =('-','--','-.','steps',':')
radio3 =RadioButtons(rax, styles)
def stylefunc(label):
l.set_linestyle(label)
plt.draw()
radio3.on_clicked(stylefunc)
#定义按钮单击事件处理函数，并在窗口上创建按钮
def randomFig(event):
#随机选择一个频率，同时设置单选钮的选中项
hz = choice(tuple(hzdict.keys()))
hzLabels =[label.get_text()for label in radio.labels]
radio.set_active(hzLabels.index(hz))
l.set_ydata(hzdict[hz])
#随机选择一个颜色，同时设置单选钮的选中项
c = choice(colors)
radio2.set_active(colors.index(c))
l.set_color(c)
#随机选择一个线型，同时设置单选钮的选中项
style = choice(styles)
radio3.set_active(styles.index(style))
l.set_linestyle(style)
#根据设置的属性绘制图形
plt.draw()
axRnd = plt.axes([0.5,0.015,0.2,0.045])
buttonRnd =Button(axRnd,'Random Figure')
buttonRnd.on_clicked(randomFig)
#显示图形
plt.show()