我有一个问题,从熊猫系列对象的直方图,我不明白为什么它不起作用。代码之前工作正常,但现在不行。使用直方图Matplotlib /熊猫错误
这里有点我的代码(具体来讲,熊猫系列的对象我想要做的直方图):
type(dfj2_MARKET1['VSPD2_perc'])
其输出结果: pandas.core.series.Series
这里是我的绘图代码:
fig, axes = plt.subplots(1, 7, figsize=(30,4))
axes[0].hist(dfj2_MARKET1['VSPD1_perc'],alpha=0.9, color='blue')
axes[0].grid(True)
axes[0].set_title(MARKET1 + ' 5-40 km/h')
错误消息:
AttributeError Traceback (most recent call last)
<ipython-input-75-3810c361db30> in <module>()
1 fig, axes = plt.subplots(1, 7, figsize=(30,4))
2
----> 3 axes[1].hist(dfj2_MARKET1['VSPD2_perc'],alpha=0.9, color='blue')
4 axes[1].grid(True)
5 axes[1].set_xlabel('Time spent [%]')
C:\Python27\lib\site-packages\matplotlib\axes.pyc in hist(self, x, bins, range, normed, weights, cumulative, bottom, histtype, align, orientation, rwidth, log, color, label, stacked, **kwargs)
8322 # this will automatically overwrite bins,
8323 # so that each histogram uses the same bins
-> 8324 m, bins = np.histogram(x[i], bins, weights=w[i], **hist_kwargs)
8325 m = m.astype(float) # causes problems later if it's an int
8326 if mlast is None:
C:\Python27\lib\site-packages\numpy\lib\function_base.pyc in histogram(a, bins, range, normed, weights, density)
158 if (mn > mx):
159 raise AttributeError(
--> 160 'max must be larger than min in range parameter.')
161
162 if not iterable(bins):
AttributeError: max must be larger than min in range parameter.
嗯,它为我工作。你可以显示你的数据框? –
嗯,奇怪的是,当我这样做时,我实际上可以产生一个直方图:s = dfj2_MARKET1 ['VSPD1_perc'] s.hist() – jonas
是的,但是你使用熊猫'hist'函数,而不是matplotlibs。而且这可以像预期的那样处理NaNs。查看我的更新。 – joris