Method reindex

xarray/core/dataarray.py:2175–2265

Conform this object onto the indexes of another object, filling in missing values with ``fill_value``. The default fill value is NaN. Parameters ---------- indexers : dict, optional Dictionary with keys given by dimension names and values given by

(
        self,
        indexers: Mapping[Any, Any] | None = None,
        *,
        method: ReindexMethodOptions = None,
        tolerance: float | Iterable[float] | str | None = None,
        copy: bool = True,
        fill_value=dtypes.NA,
        **indexers_kwargs: Any,
    )

        )

    def reindex(
        self,
        indexers: Mapping[Any, Any] | None = None,
        *,
        method: ReindexMethodOptions = None,
        tolerance: float | Iterable[float] | str | None = None,
        copy: bool = True,
        fill_value=dtypes.NA,
        **indexers_kwargs: Any,
    ) -> Self:
        """Conform this object onto the indexes of another object, filling in
        missing values with ``fill_value``. The default fill value is NaN.

        Parameters
        ----------
        indexers : dict, optional
            Dictionary with keys given by dimension names and values given by
            arrays of coordinates tick labels. Any mismatched coordinate
            values will be filled in with NaN, and any mismatched dimension
            names will simply be ignored.
            One of indexers or indexers_kwargs must be provided.
        copy : bool, optional
            If ``copy=True``, data in the return value is always copied. If
            ``copy=False`` and reindexing is unnecessary, or can be performed
            with only slice operations, then the output may share memory with
            the input. In either case, a new xarray object is always returned.
        method : {None, 'nearest', 'pad'/'ffill', 'backfill'/'bfill'}, optional
            Method to use for filling index values in ``indexers`` not found on
            this data array:

            - None (default): don't fill gaps
            - pad / ffill: propagate last valid index value forward
            - backfill / bfill: propagate next valid index value backward
            - nearest: use nearest valid index value

        tolerance : float | Iterable[float] | str | None, default: None
            Maximum distance between original and new labels for inexact
            matches. The values of the index at the matching locations must
            satisfy the equation ``abs(index[indexer] - target) <= tolerance``.
            Tolerance may be a scalar value, which applies the same tolerance
            to all values, or list-like, which applies variable tolerance per
            element. List-like must be the same size as the index and its dtype
            must exactly match the index’s type.
        fill_value : scalar or dict-like, optional
            Value to use for newly missing values. If a dict-like, maps
            variable names (including coordinates) to fill values. Use this
            data array's name to refer to the data array's values.
        **indexers_kwargs : {dim: indexer, ...}, optional
            The keyword arguments form of ``indexers``.
            One of indexers or indexers_kwargs must be provided.

        Returns
        -------
        reindexed : DataArray
            Another dataset array, with this array&#x27;s data but replaced
            coordinates.

        Examples