我写了一幅算法,使用图和校正法,从一些文本输入数据中得出图表。 当数据投入的数量为时。 超过15 000人,我参加了我的法典(附录)行:
mydata = []
for i in range(len(data)):
mydata.append(string.atof(data[i]))
错误:
Traceback (most recent call last):
File "get_histogram_picture.py", line 25, in <module>
mydata.append(string.atof(data[i]))
File "/usr/lib/python2.6/string.py", line 388, in atof
return _float(s)
ValueError: invalid literal for float(): -a
这在 p中是否是一种错误? 解决办法是什么?
增 编
这一数据 error误:
>>> float("-a")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: invalid literal for float(): -a
灰色数据结构的规模如果仅受现有记忆的限制。
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