# Resample objects ## Dataset | [`DatasetResample`](../generated/xarray.core.resample.DatasetResample.html.md#xarray.core.resample.DatasetResample)(\*args[, dim, resample_dim]) | DatasetGroupBy object specialized to resampling a specified dimension | |------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------| | [`DatasetResample.asfreq`](../generated/xarray.core.resample.DatasetResample.asfreq.html.md#xarray.core.resample.DatasetResample.asfreq)() | Return values of original object at the new up-sampling frequency; essentially a re-index with new times set to NaN. | | [`DatasetResample.backfill`](../generated/xarray.core.resample.DatasetResample.backfill.html.md#xarray.core.resample.DatasetResample.backfill)([tolerance]) | Backward fill new values at up-sampled frequency. | | [`DatasetResample.interpolate`](../generated/xarray.core.resample.DatasetResample.interpolate.html.md#xarray.core.resample.DatasetResample.interpolate)([kind]) | Interpolate up-sampled data using the original data as knots. | | [`DatasetResample.nearest`](../generated/xarray.core.resample.DatasetResample.nearest.html.md#xarray.core.resample.DatasetResample.nearest)([tolerance]) | Take new values from nearest original coordinate to up-sampled frequency coordinates. | | [`DatasetResample.pad`](../generated/xarray.core.resample.DatasetResample.pad.html.md#xarray.core.resample.DatasetResample.pad)([tolerance]) | Forward fill new values at up-sampled frequency. | | [`DatasetResample.all`](../generated/xarray.core.resample.DatasetResample.all.html.md#xarray.core.resample.DatasetResample.all)([dim, keep_attrs]) | Reduce this Dataset's data by applying `all` along some dimension(s). | | [`DatasetResample.any`](../generated/xarray.core.resample.DatasetResample.any.html.md#xarray.core.resample.DatasetResample.any)([dim, keep_attrs]) | Reduce this Dataset's data by applying `any` along some dimension(s). | | [`DatasetResample.apply`](../generated/xarray.core.resample.DatasetResample.apply.html.md#xarray.core.resample.DatasetResample.apply)(func[, args, shortcut]) | Backward compatible implementation of `map` | | [`DatasetResample.assign`](../generated/xarray.core.resample.DatasetResample.assign.html.md#xarray.core.resample.DatasetResample.assign)(\*\*kwargs) | Assign data variables by group. | | [`DatasetResample.assign_coords`](../generated/xarray.core.resample.DatasetResample.assign_coords.html.md#xarray.core.resample.DatasetResample.assign_coords)([coords]) | Assign coordinates by group. | | [`DatasetResample.bfill`](../generated/xarray.core.resample.DatasetResample.bfill.html.md#xarray.core.resample.DatasetResample.bfill)([tolerance]) | Backward fill new values at up-sampled frequency. | | [`DatasetResample.count`](../generated/xarray.core.resample.DatasetResample.count.html.md#xarray.core.resample.DatasetResample.count)([dim, keep_attrs]) | Reduce this Dataset's data by applying `count` along some dimension(s). | | [`DatasetResample.ffill`](../generated/xarray.core.resample.DatasetResample.ffill.html.md#xarray.core.resample.DatasetResample.ffill)([tolerance]) | Forward fill new values at up-sampled frequency. | | [`DatasetResample.fillna`](../generated/xarray.core.resample.DatasetResample.fillna.html.md#xarray.core.resample.DatasetResample.fillna)(value) | Fill missing values in this object by group. | | [`DatasetResample.first`](../generated/xarray.core.resample.DatasetResample.first.html.md#xarray.core.resample.DatasetResample.first)([skipna, keep_attrs]) | Return the first element of each group along the group dimension | | [`DatasetResample.last`](../generated/xarray.core.resample.DatasetResample.last.html.md#xarray.core.resample.DatasetResample.last)([skipna, keep_attrs]) | Return the last element of each group along the group dimension | | [`DatasetResample.map`](../generated/xarray.core.resample.DatasetResample.map.html.md#xarray.core.resample.DatasetResample.map)(func[, args, shortcut]) | Apply a function over each Dataset in the groups generated for resampling and concatenate them together into a new Dataset. | | [`DatasetResample.max`](../generated/xarray.core.resample.DatasetResample.max.html.md#xarray.core.resample.DatasetResample.max)([dim, skipna, keep_attrs]) | Reduce this Dataset's data by applying `max` (i.e., maximum) along some dimension(s). | | [`DatasetResample.mean`](../generated/xarray.core.resample.DatasetResample.mean.html.md#xarray.core.resample.DatasetResample.mean)([dim, skipna, keep_attrs]) | Reduce this Dataset's data by applying `mean` along some dimension(s). | | [`DatasetResample.median`](../generated/xarray.core.resample.DatasetResample.median.html.md#xarray.core.resample.DatasetResample.median)([dim, skipna, keep_attrs]) | Reduce this Dataset's data by applying `median` along some dimension(s). | | [`DatasetResample.min`](../generated/xarray.core.resample.DatasetResample.min.html.md#xarray.core.resample.DatasetResample.min)([dim, skipna, keep_attrs]) | Reduce this Dataset's data by applying `min` (i.e., minimum) along some dimension(s). | | [`DatasetResample.prod`](../generated/xarray.core.resample.DatasetResample.prod.html.md#xarray.core.resample.DatasetResample.prod)([dim, skipna, ...]) | Reduce this Dataset's data by applying `prod` (i.e., product) along some dimension(s). | | [`DatasetResample.quantile`](../generated/xarray.core.resample.DatasetResample.quantile.html.md#xarray.core.resample.DatasetResample.quantile)(q[, dim, method, ...]) | Compute the qth quantile over each array in the groups and concatenate them together into a new array. | | [`DatasetResample.reduce`](../generated/xarray.core.resample.DatasetResample.reduce.html.md#xarray.core.resample.DatasetResample.reduce)(func[, dim, axis, ...]) | Reduce the items in this group by applying func along the pre-defined resampling dimension. | | [`DatasetResample.std`](../generated/xarray.core.resample.DatasetResample.std.html.md#xarray.core.resample.DatasetResample.std)([dim, skipna, ddof, ...]) | Reduce this Dataset's data by applying `std` (i.e., standard deviation) along some dimension(s). | | [`DatasetResample.sum`](../generated/xarray.core.resample.DatasetResample.sum.html.md#xarray.core.resample.DatasetResample.sum)([dim, skipna, ...]) | Reduce this Dataset's data by applying `sum` along some dimension(s). | | [`DatasetResample.var`](../generated/xarray.core.resample.DatasetResample.var.html.md#xarray.core.resample.DatasetResample.var)([dim, skipna, ddof, ...]) | Reduce this Dataset's data by applying `var` (i.e., variance) along some dimension(s). | | [`DatasetResample.where`](../generated/xarray.core.resample.DatasetResample.where.html.md#xarray.core.resample.DatasetResample.where)(cond[, other]) | Return elements from self or other depending on cond. | | [`DatasetResample.dims`](../generated/xarray.core.resample.DatasetResample.dims.html.md#xarray.core.resample.DatasetResample.dims) | | | [`DatasetResample.groups`](../generated/xarray.core.resample.DatasetResample.groups.html.md#xarray.core.resample.DatasetResample.groups) | Mapping from group labels to indices. | ## DataArray | [`DataArrayResample`](../generated/xarray.core.resample.DataArrayResample.html.md#xarray.core.resample.DataArrayResample)(\*args[, dim, resample_dim]) | DataArrayGroupBy object specialized to time resampling operations over a specified dimension | |----------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------| | [`DataArrayResample.asfreq`](../generated/xarray.core.resample.DataArrayResample.asfreq.html.md#xarray.core.resample.DataArrayResample.asfreq)() | Return values of original object at the new up-sampling frequency; essentially a re-index with new times set to NaN. | | [`DataArrayResample.backfill`](../generated/xarray.core.resample.DataArrayResample.backfill.html.md#xarray.core.resample.DataArrayResample.backfill)([tolerance]) | Backward fill new values at up-sampled frequency. | | [`DataArrayResample.interpolate`](../generated/xarray.core.resample.DataArrayResample.interpolate.html.md#xarray.core.resample.DataArrayResample.interpolate)([kind]) | Interpolate up-sampled data using the original data as knots. | | [`DataArrayResample.nearest`](../generated/xarray.core.resample.DataArrayResample.nearest.html.md#xarray.core.resample.DataArrayResample.nearest)([tolerance]) | Take new values from nearest original coordinate to up-sampled frequency coordinates. | | [`DataArrayResample.pad`](../generated/xarray.core.resample.DataArrayResample.pad.html.md#xarray.core.resample.DataArrayResample.pad)([tolerance]) | Forward fill new values at up-sampled frequency. | | [`DataArrayResample.all`](../generated/xarray.core.resample.DataArrayResample.all.html.md#xarray.core.resample.DataArrayResample.all)([dim, keep_attrs]) | Reduce this DataArray's data by applying `all` along some dimension(s). | | [`DataArrayResample.any`](../generated/xarray.core.resample.DataArrayResample.any.html.md#xarray.core.resample.DataArrayResample.any)([dim, keep_attrs]) | Reduce this DataArray's data by applying `any` along some dimension(s). | | [`DataArrayResample.apply`](../generated/xarray.core.resample.DataArrayResample.apply.html.md#xarray.core.resample.DataArrayResample.apply)(func[, args, shortcut]) | Backward compatible implementation of `map` | | [`DataArrayResample.assign_coords`](../generated/xarray.core.resample.DataArrayResample.assign_coords.html.md#xarray.core.resample.DataArrayResample.assign_coords)([coords]) | Assign coordinates by group. | | [`DataArrayResample.bfill`](../generated/xarray.core.resample.DataArrayResample.bfill.html.md#xarray.core.resample.DataArrayResample.bfill)([tolerance]) | Backward fill new values at up-sampled frequency. | | [`DataArrayResample.count`](../generated/xarray.core.resample.DataArrayResample.count.html.md#xarray.core.resample.DataArrayResample.count)([dim, keep_attrs]) | Reduce this DataArray's data by applying `count` along some dimension(s). | | [`DataArrayResample.ffill`](../generated/xarray.core.resample.DataArrayResample.ffill.html.md#xarray.core.resample.DataArrayResample.ffill)([tolerance]) | Forward fill new values at up-sampled frequency. | | [`DataArrayResample.fillna`](../generated/xarray.core.resample.DataArrayResample.fillna.html.md#xarray.core.resample.DataArrayResample.fillna)(value) | Fill missing values in this object by group. | | [`DataArrayResample.first`](../generated/xarray.core.resample.DataArrayResample.first.html.md#xarray.core.resample.DataArrayResample.first)([skipna, keep_attrs]) | Return the first element of each group along the group dimension | | [`DataArrayResample.last`](../generated/xarray.core.resample.DataArrayResample.last.html.md#xarray.core.resample.DataArrayResample.last)([skipna, keep_attrs]) | Return the last element of each group along the group dimension | | [`DataArrayResample.map`](../generated/xarray.core.resample.DataArrayResample.map.html.md#xarray.core.resample.DataArrayResample.map)(func[, args, shortcut]) | Apply a function to each array in the group and concatenate them together into a new array. | | [`DataArrayResample.max`](../generated/xarray.core.resample.DataArrayResample.max.html.md#xarray.core.resample.DataArrayResample.max)([dim, skipna, keep_attrs]) | Reduce this DataArray's data by applying `max` (i.e., maximum) along some dimension(s). | | [`DataArrayResample.mean`](../generated/xarray.core.resample.DataArrayResample.mean.html.md#xarray.core.resample.DataArrayResample.mean)([dim, skipna, keep_attrs]) | Reduce this DataArray's data by applying `mean` along some dimension(s). | | [`DataArrayResample.median`](../generated/xarray.core.resample.DataArrayResample.median.html.md#xarray.core.resample.DataArrayResample.median)([dim, skipna, ...]) | Reduce this DataArray's data by applying `median` along some dimension(s). | | [`DataArrayResample.min`](../generated/xarray.core.resample.DataArrayResample.min.html.md#xarray.core.resample.DataArrayResample.min)([dim, skipna, keep_attrs]) | Reduce this DataArray's data by applying `min` (i.e., minimum) along some dimension(s). | | [`DataArrayResample.prod`](../generated/xarray.core.resample.DataArrayResample.prod.html.md#xarray.core.resample.DataArrayResample.prod)([dim, skipna, ...]) | Reduce this DataArray's data by applying `prod` (i.e., product) along some dimension(s). | | [`DataArrayResample.quantile`](../generated/xarray.core.resample.DataArrayResample.quantile.html.md#xarray.core.resample.DataArrayResample.quantile)(q[, dim, method, ...]) | Compute the qth quantile over each array in the groups and concatenate them together into a new array. | | [`DataArrayResample.reduce`](../generated/xarray.core.resample.DataArrayResample.reduce.html.md#xarray.core.resample.DataArrayResample.reduce)(func[, dim, axis, ...]) | Reduce the items in this group by applying func along the pre-defined resampling dimension. | | [`DataArrayResample.std`](../generated/xarray.core.resample.DataArrayResample.std.html.md#xarray.core.resample.DataArrayResample.std)([dim, skipna, ddof, ...]) | Reduce this DataArray's data by applying `std` (i.e., standard deviation) along some dimension(s). | | [`DataArrayResample.sum`](../generated/xarray.core.resample.DataArrayResample.sum.html.md#xarray.core.resample.DataArrayResample.sum)([dim, skipna, ...]) | Reduce this DataArray's data by applying `sum` along some dimension(s). | | [`DataArrayResample.var`](../generated/xarray.core.resample.DataArrayResample.var.html.md#xarray.core.resample.DataArrayResample.var)([dim, skipna, ddof, ...]) | Reduce this DataArray's data by applying `var` (i.e., variance) along some dimension(s). | | [`DataArrayResample.where`](../generated/xarray.core.resample.DataArrayResample.where.html.md#xarray.core.resample.DataArrayResample.where)(cond[, other]) | Return elements from self or other depending on cond. | | [`DataArrayResample.dims`](../generated/xarray.core.resample.DataArrayResample.dims.html.md#xarray.core.resample.DataArrayResample.dims) | | | [`DataArrayResample.groups`](../generated/xarray.core.resample.DataArrayResample.groups.html.md#xarray.core.resample.DataArrayResample.groups) | Mapping from group labels to indices. |