减去时间戳的列给我 TypeError
Subtracting columns of Timestamps gives me TypeError
我有一个看起来像这样的数据框
dt1 dt2
0 2011-09-12 09:57:03.839546 2011-09-12 09:51:29.332474
1 2011-09-12 09:57:03.841132 2011-09-12 09:55:29.332774
2 2011-09-12 10:57:28.581049 2011-09-12 10:55:29.332774
3 2011-09-12 10:57:28.581049 2011-09-12 10:55:29.332774
4 2011-09-12 10:57:28.582636 2011-09-12 10:55:29.332774
条目的 class 是 pandas.tslib.Timestamp
。当我做
df['dt1'][:]-df['dt2'][:]
我很好,但是这个
df['dt1']-df['dt2']
失败并出现以下错误
TypeError: Argument 'values' has incorrect type (expected numpy.ndarray, got Series)
为什么会发生这种情况,我该如何解决?
转换为 datetime64
可以修复它。
df['dt1'] = pd.to_datetime(df['dt1'])
df['dt2'] = pd.to_datetime(df['dt2'])
df['dt1']-df['dt2']
0 00:05:34.507072
1 00:01:34.508358
2 00:01:59.248275
3 00:01:59.248275
4 00:01:59.249862
我有一个看起来像这样的数据框
dt1 dt2
0 2011-09-12 09:57:03.839546 2011-09-12 09:51:29.332474
1 2011-09-12 09:57:03.841132 2011-09-12 09:55:29.332774
2 2011-09-12 10:57:28.581049 2011-09-12 10:55:29.332774
3 2011-09-12 10:57:28.581049 2011-09-12 10:55:29.332774
4 2011-09-12 10:57:28.582636 2011-09-12 10:55:29.332774
条目的 class 是 pandas.tslib.Timestamp
。当我做
df['dt1'][:]-df['dt2'][:]
我很好,但是这个
df['dt1']-df['dt2']
失败并出现以下错误
TypeError: Argument 'values' has incorrect type (expected numpy.ndarray, got Series)
为什么会发生这种情况,我该如何解决?
转换为 datetime64
可以修复它。
df['dt1'] = pd.to_datetime(df['dt1'])
df['dt2'] = pd.to_datetime(df['dt2'])
df['dt1']-df['dt2']
0 00:05:34.507072
1 00:01:34.508358
2 00:01:59.248275
3 00:01:59.248275
4 00:01:59.249862