xarray.core.accessor_dt.DatetimeAccessor¶
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class
xarray.core.accessor_dt.
DatetimeAccessor
(obj)¶ Access datetime fields for DataArrays with datetime-like dtypes.
Fields can be accessed through the .dt attribute for applicable DataArrays.
Notes
Note that these fields are not calendar-aware; if your datetimes are encoded with a non-Gregorian calendar (e.g. a 360-day calendar) using cftime, then some fields like dayofyear may not be accurate.
Examples
>>> import xarray as xr >>> import pandas as pd >>> dates = pd.date_range(start="2000/01/01", freq="D", periods=10) >>> ts = xr.DataArray(dates, dims=("time")) >>> ts <xarray.DataArray (time: 10)> array(['2000-01-01T00:00:00.000000000', '2000-01-02T00:00:00.000000000', '2000-01-03T00:00:00.000000000', '2000-01-04T00:00:00.000000000', '2000-01-05T00:00:00.000000000', '2000-01-06T00:00:00.000000000', '2000-01-07T00:00:00.000000000', '2000-01-08T00:00:00.000000000', '2000-01-09T00:00:00.000000000', '2000-01-10T00:00:00.000000000'], dtype='datetime64[ns]') Coordinates: * time (time) datetime64[ns] 2000-01-01 2000-01-02 ... 2000-01-10 >>> ts.dt <xarray.core.accessor_dt.DatetimeAccessor object at 0x118b54d68> >>> ts.dt.dayofyear <xarray.DataArray 'dayofyear' (time: 10)> array([ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) Coordinates: * time (time) datetime64[ns] 2000-01-01 2000-01-02 ... 2000-01-10 >>> ts.dt.quarter <xarray.DataArray 'quarter' (time: 10)> array([1, 1, 1, 1, 1, 1, 1, 1, 1, 1]) Coordinates: * time (time) datetime64[ns] 2000-01-01 2000-01-02 ... 2000-01-10
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__init__
(self, obj)¶ Initialize self. See help(type(self)) for accurate signature.
Methods
__init__
(self, obj)Initialize self.
ceil
(self, freq)Round timestamps upward to specified frequency resolution.
floor
(self, freq)Round timestamps downward to specified frequency resolution.
round
(self, freq)Round timestamps to specified frequency resolution.
strftime
(self, date_format)Return an array of formatted strings specified by date_format, which supports the same string format as the python standard library.
Attributes
The days of the datetime
The day of the week with Monday=0, Sunday=6
The ordinal day of the year
The number of days in the month
The number of days in the month
The hours of the datetime
is_leap_year
Boolean indicator if the date belongs to a leap year.
is_month_end
Indicates whether the date is the last day of the month.
is_month_start
Indicates whether the date is the first day of the month.
is_quarter_end
Indicator for whether the date is the last day of a quarter.
is_quarter_start
Indicator for whether the date is the first day of a quarter.
is_year_end
Indicate whether the date is the last day of the year.
is_year_start
Indicate whether the date is the first day of a year.
The microseconds of the datetime
The minutes of the datetime
The month as January=1, December=12
The nanoseconds of the datetime
The quarter of the date
Season of the year
The seconds of the datetime
Timestamps corresponding to datetimes
The week ordinal of the year
The day of the week with Monday=0, Sunday=6
The name of day in a week
The week ordinal of the year
The year of the datetime
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