# xarray.core.accessor_str.StringAccessor.upper

#### StringAccessor.upper()[[source]](https://github.com/pydata/xarray/blob/main/xarray/core/accessor_str.py#L779-L800)

Convert strings in the array to uppercase.

* **Returns:**
  **uppered** (`same type as values`)

### Examples

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```pycon
>>> da = xr.DataArray(["temperature", "HuMiDiTy"], dims="x")
>>> da
<xarray.DataArray (x: 2)> Size: 88B
array(['temperature', 'HuMiDiTy'], dtype='<U11')
Dimensions without coordinates: x
>>> uppered = da.str.upper()
>>> uppered
<xarray.DataArray (x: 2)> Size: 88B
array(['TEMPERATURE', 'HUMIDITY'], dtype='<U11')
Dimensions without coordinates: x
```

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