質問編集履歴
2
追記 データフレーム生成段階のコードを追加
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```python
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import pandas as pd
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import time
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import spidev
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import sys
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import numpy as np
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import subprocess
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from threading import Thread
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import csv
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-
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cond = True
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data1 = 0
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data2 = 0
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df1 = pd.DataFrame(columns=['ch0','ch2'])#data2
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def main():
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spi = spidev.SpiDev()
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spi.open(0,0)
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def f():
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global cond
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time.sleep(20)
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cond = False
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thread = Thread(target=f)
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thread.start()
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while cond:
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resp = spi.xfer2([0x68,0x00])
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data1 = ((resp[0] << 8 ) + resp[1]) & 0x3ff
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resp2 = spi.xfer([0x78,0x00])
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data2 = ((resp2[0] << 8) + resp2[1]) & 0x3ff
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global df1
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df1 = df1.append({'ch0':[data1],'ch2':[data2]},ignore_index=True)
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print (df1)
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df1.to_csv('myakuha.csv')
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#left max
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df10max = df1['ch0'].max()
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#print('left:',df10max)
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#right max
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df12max = df1['ch2'].max()
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#print('right:',df12max)
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df110max = np.array(df10max)
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df112max = np.array(df12max)
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if df10max > df12max:
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leftmax = df110max - df112max
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print ('overL:',leftmax)
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if df10max < df12max:
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rightmax = df112max - df110max
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print ('overR:',rightmax)
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if __name__=='__main__':
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main()
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```
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1
エラー内容の修正
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -6,15 +6,33 @@
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6
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7
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Traceback (most recent call last):
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File "/home/pi/
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File "/home/pi/5\17.py", line 14, in <module>
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main()
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File "/home/pi/
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File "/home/pi/5\17.py", line 7, in main
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d
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data.plot()
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File "/usr/lib/python3/dist-packages/pandas/tools/plotting.py", line
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2165, in plot_frame
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plot_obj.generate()
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File "/usr/lib/python3/dist-packages/pandas/tools/plotting.py", line
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900, in generate
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self._compute_plot_data()
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File "/usr/lib/python3/dist-packages/pandas/tools/plotting.py", line
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970, in _compute_plot_data
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'plot'.format(numeric_data.__class__.__name__))
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TypeError: Empty 'DataFrame': no numeric data to plot
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