array_api_extra.nan_to_num¶

array_api_extra.nan_to_num(x, /, *, fill_value=0.0, xp=None)¶

Replace NaN with zero and infinity with large finite numbers (default behaviour).

If x is inexact, NaN is replaced by zero or by the user defined value in the fill_value keyword, infinity is replaced by the largest finite floating point value representable by x.dtype, and -infinity is replaced by the most negative finite floating point value representable by x.dtype.

For complex dtypes, the above is applied to each of the real and imaginary components of x separately.

Parameters:

x (array | float | complex) – Input data.
fill_value (int | float, optional) – Value to be used to fill NaN values. If no value is passed then NaN values will be replaced with 0.0.
xp (array_namespace, optional) – The standard-compatible namespace for x. Default: infer.

Returns:

x, with the non-finite values replaced.

Return type:

array

See also

array_api.isnan: Shows which elements are Not a Number (NaN).

Examples

>>> import array_api_extra as xpx
>>> import array_api_strict as xp
>>> xpx.nan_to_num(xp.inf)
1.7976931348623157e+308
>>> xpx.nan_to_num(-xp.inf)
-1.7976931348623157e+308
>>> xpx.nan_to_num(xp.nan)
0.0
>>> x = xp.asarray([xp.inf, -xp.inf, xp.nan, -128, 128])
>>> xpx.nan_to_num(x)
array([ 1.79769313e+308, -1.79769313e+308,  0.00000000e+000, # may vary
       -1.28000000e+002,  1.28000000e+002])
>>> y = xp.asarray([complex(xp.inf, xp.nan), xp.nan, complex(xp.nan, xp.inf)])
array([  1.79769313e+308,  -1.79769313e+308,   0.00000000e+000, # may vary
     -1.28000000e+002,   1.28000000e+002])
>>> xpx.nan_to_num(y)
array([  1.79769313e+308 +0.00000000e+000j, # may vary
         0.00000000e+000 +0.00000000e+000j,
         0.00000000e+000 +1.79769313e+308j])