mars.dataframe.Series.dt.is_quarter_start

Series.dt.is_quarter_start

Indicator for whether the date is the first day of a quarter.

返回

is_quarter_start – The same type as the original data with boolean values. Series will have the same name and index. DatetimeIndex will have the same name.

返回类型

Series or DatetimeIndex

参见

quarter

Return the quarter of the date.

is_quarter_end

Similar property for indicating the quarter start.

示例

This method is available on Series with datetime values under the .dt accessor, and directly on DatetimeIndex.

>>> import mars.dataframe as md
>>> df = md.DataFrame({'dates': md.date_range("2017-03-30",
...                   periods=4)})
>>> df.assign(quarter=df.dates.dt.quarter,
...           is_quarter_start=df.dates.dt.is_quarter_start).execute()
       dates  quarter  is_quarter_start
0 2017-03-30        1             False
1 2017-03-31        1             False
2 2017-04-01        2              True
3 2017-04-02        2             False

>>> idx = md.date_range('2017-03-30', periods=4)
>>> idx.execute()
DatetimeIndex(['2017-03-30', '2017-03-31', '2017-04-01', '2017-04-02'],
              dtype='datetime64[ns]', freq='D')

>>> idx.is_quarter_start.execute()
array([False, False,  True, False])