python 利用matploylib画动态雷达实时显示图

import numpy as np
import matplotlib.pyplot as plt

t = []
r = []


# 建一个txt文件放自己的数据
data = np.loadtxt('11.txt')

for i in range(len(data)):

    plt.ion() # 这个必须

    t.append(data[i,0])
    r.append(data[i,1])
    theta = np.array(t)

    # 清屏
    plt.clf()

    # 画极坐标图
    plt.polar(theta*np.pi,r,'ro',lw=2)
    plt.ylim(0,1000)
    plt.pause(0.5)

    plt.ioff()   # 这个也必须

plt.show()

 可以加个定时器，让程序循环画图。

from threading import Timer
import numpy as np
import matplotlib.pyplot as plt
def hello():
     # print("hello, world")
     t = []
     r = []

     data = np.loadtxt('11.txt')

     for i in range(len(data)):
         plt.ion()

         t.append(data[i, 0])
         r.append(data[i, 1])
         theta = np.array(t)
         plt.clf()

         plt.polar(theta * np.pi, r, 'ro', lw=2)
         plt.ylim(0, 1000)
         plt.pause(0.01)
         plt.ioff()
     # plt.show()
     plt.pause(0.1)
     # plt.close()
     plt.clf()
class RepeatingTimer(Timer):
    def run(self):
        while not self.finished.is_set():
            self.function(*self.args, **self.kwargs)
            self.finished.wait(self.interval)

t = RepeatingTimer(0.0, hello)
t.start()