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我试图在python中绘制直方图时遇到了一个错误。 你能帮我解决这个错误吗? 我认为这不是一个大问题,但我可以找到解决方案。 :(在python中绘制Matplotlib直方图
代码
import matplotlib.pyplot as plt
import csv
import sys
def analyze():
# datafile = 'test.csv'
datafile = sys.argv[1]
pieces = []
with open(datafile, 'rt') as f:
data = csv.reader(f,delimiter = '\t')
for d in data:
pieces.append(d)
x = [op for op, response, interval in pieces]
y1 = [interval for op, response, interval in pieces]
plt.figure()
plt.hist(y1)
plt.show()
if __name__ == '__main__':
analyze()
错误消息:
File "./scripts/plot_histo.py", line 27, in <module>
analyze()
File "./scripts/plot_histo.py", line 23, in analyze
plt.hist(y1)
File "/usr/local/anaconda2/lib/python2.7/site-packages/matplotlib/pyplot.py", line 2958, in hist
stacked=stacked, data=data, **kwargs)
File "/usr/local/anaconda2/lib/python2.7/site-packages/matplotlib/__init__.py", line 1812, in inner
return func(ax, *args, **kwargs)
File "/usr/local/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_axes.py", line 5995, in hist
if len(xi) > 0:
TypeError: len() of unsized object
数据文件格式:
653070 232.93 104981.00
653071 277.94 104981.00
653072 232.93 12695.00
653073 232.93 25878.00
653074 232.93 32714.00
653075 232.93 19532.00
653076 232.93 19532.00
653077 232.93 32715.00
653078 232.93 32715.00
653079 232.93 45899.00
653080 232.93 65430.00
653081 232.93 65430.00
Continued .......
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