from time import sleep
from threading importThread
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.widgets importButton
fig, ax = plt.subplots()
#設置圖形顯示位置
plt.subplots_adjust(bottom=0.2)
#實驗數據
range_start, range_end, range_step =0,1,0.005
t = np.arange(range_start, range_end, range_step)
s = np.sin(4*np.pi*t)
l,= plt.plot(t, s, lw=2)
#自定義類，用來封裝兩個按鈕的單擊事件處理函數
classButtonHandler:
def __init__(self):
self.flag =True
self.range_s, self.range_e, self.range_step =0,1,0.005
#線程函數，用來更新數據并重新繪制圖形
def threadStart(self):
while self.flag:
sleep(0.02)
self.range_s += self.range_step
self.range_e += self.range_step
t = np.arange(self.range_s, self.range_e, self.range_step)
ydata = np.sin(4*np.pi*t)
#更新數據
l.set_xdata(t-t[0])
l.set_ydata(ydata)
#重新繪制圖形
plt.draw()
defStart(self, event):
self.flag =True
#創(chuàng)建并啟動新線程
t =Thread(target=self.threadStart)
t.start()
defStop(self, event):
self.flag =False
callback =ButtonHandler()
#創(chuàng)建按鈕并設置單擊事件處理函數
axprev = plt.axes([0.81,0.05,0.1,0.075])
bprev =Button(axprev,'Stop')
bprev.on_clicked(callback.Stop)
axnext = plt.axes([0.7,0.05,0.1,0.075])
bnext =Button(axnext,'Start')
bnext.on_clicked(callback.Start)
plt.show()