Question

我有一个每秒更新一次的温度列表，我最终希望做的是制作一个实时图，能够用新数据替换旧数据。从本质上讲，我想获取大量数据并让图表实时绘制它，但只显示最近的100个数据点。我已经设计了下面看到的代码，但我不确定如何附加xdata以使其与ydata的长度相同。我一直收到错误＆＃34; xdata和ydata的长度必须相同。＆＃34;如果有更简单的方法可以做我想要的事情，请让我知道。

temperature = []
x = list()
y = list()
x1 = list()
y1 = list()

# Read loop
for i in range(1000):
    # Get the thermocouple reading on AIN0. 
    tempC = ljm.eReadName(handle, "AIN0_EF_READ_A")
    temperature.append(tempC)
    dT = temperature[i]-temperature[i-1]

    if -.5<dT<.5:
        print "Temperature:","%.3f"% temperature[i],"         " "dT:", "%.3f"% dT, "         " "Steady State" 
        sleep(1)
    else:
        print "Temperature:","%.3f"% temperature[i],"         " "dT:", "%.3f"% dT
        sleep(1) 

    x.append(i)
    y.append(temperature[i])

    x1.append(i)
    y1.append(dT)

    fig = plt.figure()
    ax = fig.add_subplot(111)
    li, = ax.plot(x,y)


    # draw and show it
    fig.canvas.draw()
    plt.show(block=False)

    # loop to update the data
    while True:
        try:
            y[:-10] = y[10:]
            y.append(temperature[i])

            # set the new data
            li.set_ydata(y)

            fig.canvas.draw()

            sleep(1)
        except KeyboardInterrupt:
            break

使x数据成为y数据的大小

0 个答案: