polars.DataFrame.sum_horizontal#

DataFrame.sum_horizontal(*, ignore_nulls: bool = True) → Series[source]#

Sum all values horizontally across columns.

Parameters:

ignore_nulls: Ignore null values (default). If set to False, any null value in the input will lead to a null output.

Returns:

Series: A Series named "sum".

Examples

>>> df = pl.DataFrame(
...     {
...         "foo": [1, 2, 3],
...         "bar": [4.0, 5.0, 6.0],
...     }
... )
>>> df.sum_horizontal()
shape: (3,)
Series: 'sum' [f64]
[
        5.0
        7.0
        9.0
]