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  * polars.LazyF... 

#  polars.LazyFrame.fill_nan  #

LazyFrame.  fill_nan  (  _ value  :  [ int  ](https://docs.python.org/3/library/functions.html#int "\(in Python v3.12\)") |  [ float  ](https://docs.python.org/3/library/functions.html#float "\(in Python v3.12\)") |  Expr  |  [ None  ](https://docs.python.org/3/library/constants.html#None "\(in Python v3.12\)") _ )  →  Self  [ [source]  ](https://github.com/pola-rs/polars/blob/main/py-polars/polars/lazyframe/frame.py#L5028-L5065) # 
    

Fill floating point NaN values.

Parameters  :

    

**value**

    

Value to fill the NaN values with.

Warning

Note that floating point NaN (Not a Number) are not missing values! To replace
missing values, use [ ` fill_null()  `
](polars.LazyFrame.fill_null.html#polars.LazyFrame.fill_null
"polars.LazyFrame.fill_null") instead.

Examples

    
    
    >>> lf = pl.LazyFrame(
    ...     {
    ...         "a": [1.5, 2, float("nan"), 4],
    ...         "b": [0.5, 4, float("nan"), 13],
    ...     }
    ... )
    >>> lf.fill_nan(99).collect()
    shape: (4, 2)
    ┌──────┬──────┐
    │ a    ┆ b    │
    │ ---  ┆ ---  │
    │ f64  ┆ f64  │
    ╞══════╪══════╡
    │ 1.5  ┆ 0.5  │
    │ 2.0  ┆ 4.0  │
    │ 99.0 ┆ 99.0 │