python绘制动态曲线教程
从txt种获取数据 并且通过动态曲线显示
import numpy as np import matplotlib.pyplot as plt import matplotlib.animation as animation import time # Fixing random state for reproducibility np.random.seed(196) path = "feed.txt" file = open(path, 'r') data = [] for line in file.readlines(): lineArr = line.strip().split() data.append(int(lineArr[0])) xdata = np.arange(0,len(data)) #初始数据绘图 dis = np.zeros(40) dis2 = dis fig, ax = plt.subplots() line, = ax.plot(dis) ax.set_ylim(0, 100) plt.grid(True) ax.set_ylabel("distance: m") ax.set_xlabel("time") def update(frame): global dis global dis2 global line #读入模拟 a = frame time.sleep(np.random.rand()/10) #绘图数据生成 dis[0:-1] = dis2[1:] dis[-1] = a dis2 = dis #绘图 line.set_ydata(dis) #颜色设置 plt.setp(line, 'color', 'b', 'linewidth', 2.0) return line ani = animation.FuncAnimation(fig, update,frames=data, interval=10) plt.show()
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