import numpy as np import matplotlib.pyplot as plt import spidev import sys import time spi = spidev.SpiDev() spi.open(0,0) def main(): data1 = [0]*100 t = np.arange(0,100,1) #interactive mode plt.ion() while True: #spidev data = spi.xfer2([0x68,0x00]) b = (data[0] * 256 + data[1]) & 0x3ff #to list data1.append(b) data1.pop(99) data1.insert(0,float(b)) #plot print(data1) print(t) line, = plt.plot(t,data1,"r-") line.set_ydata(data1) plt.legend();plt.grid() plt.xlim([1,100]);plt.ylim([-90]) plt.draw();plt.clf() if __name__=='__main__': main()
[ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99]
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0]
Traceback (most recent call last):
File "/home/pi/5\07.py", line 74, in <module>
main()
File "/home/pi/5\07.py", line 55, in main
line, = plt.plot(t, x, "r-")
File "/usr/lib/python3/dist-packages/matplotlib/pyplot.py", line 3099, in plot
ret = ax.plot(*args, **kwargs)
File "/usr/lib/python3/dist-packages/matplotlib/axes/_axes.py", line
1374, in plot
for line in self._get_lines(*args, **kwargs):
File "/usr/lib/python3/dist-packages/matplotlib/axes/_base.py", line
303, in _grab_next_args
for seg in self._plot_args(remaining, kwargs):
File "/usr/lib/python3/dist-packages/matplotlib/axes/_base.py", line
281, in _plot_args
x, y = self._xy_from_xy(x, y)
File "/usr/lib/python3/dist-packages/matplotlib/axes/_base.py", line
223, in _xy_from_xy
raise ValueError("x and y must have same first dimension")
ValueError: x and y must have same first dimension
上のようなプログラムにてこのようなエラーが発生しました。ndarrayとlistではグラフの作成ができないという事なのでしょうか?解決策を教えていただけると幸いです。
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2018/05/12 07:46