dask.array.ma.set_fill_value

dask.array.ma.set_fill_value(a, fill_value)[source]

Set the filling value of a, if a is a masked array.

This docstring was copied from numpy.ma.set_fill_value.

Some inconsistencies with the Dask version may exist.

This function changes the fill value of the masked array a in place. If a is not a masked array, the function returns silently, without doing anything.

Parameters
aarray_like

Input array.

fill_valuedtype

Filling value. A consistency test is performed to make sure the value is compatible with the dtype of a.

Returns
None

Nothing returned by this function.

See also

maximum_fill_value

Return the default fill value for a dtype.

MaskedArray.fill_value

Return current fill value.

MaskedArray.set_fill_value

Equivalent method.

Examples

>>> import numpy.ma as ma  
>>> a = np.arange(5)  
>>> a  
array([0, 1, 2, 3, 4])
>>> a = ma.masked_where(a < 3, a)  
>>> a  
masked_array(data=[--, --, --, 3, 4],
             mask=[ True,  True,  True, False, False],
       fill_value=999999)
>>> ma.set_fill_value(a, -999)  
>>> a  
masked_array(data=[--, --, --, 3, 4],
             mask=[ True,  True,  True, False, False],
       fill_value=-999)

Nothing happens if a is not a masked array.

>>> a = list(range(5))  
>>> a  
[0, 1, 2, 3, 4]
>>> ma.set_fill_value(a, 100)  
>>> a  
[0, 1, 2, 3, 4]
>>> a = np.arange(5)  
>>> a  
array([0, 1, 2, 3, 4])
>>> ma.set_fill_value(a, 100)  
>>> a  
array([0, 1, 2, 3, 4])