dask.array.isreal(*args, **kwargs)

Returns a bool array, where True if input element is real.

This docstring was copied from numpy.isreal.

Some inconsistencies with the Dask version may exist.

If element has complex type with zero complex part, the return value for that element is True.

xarray_like (Not supported in Dask)

Input array.

outndarray, bool

Boolean array of same shape as x.

See also


Return True if x is not a complex type.


isreal may behave unexpectedly for string or object arrays (see examples)


>>> a = np.array([1+1j, 1+0j, 4.5, 3, 2, 2j], dtype=complex)  
>>> np.isreal(a)  
array([False,  True,  True,  True,  True, False])

The function does not work on string arrays.

>>> a = np.array([2j, "a"], dtype="U")  
>>> np.isreal(a)  # Warns about non-elementwise comparison  

Returns True for all elements in input array of dtype=object even if any of the elements is complex.

>>> a = np.array([1, "2", 3+4j], dtype=object)  
>>> np.isreal(a)  
array([ True,  True,  True])

isreal should not be used with object arrays

>>> a = np.array([1+2j, 2+1j], dtype=object)  
>>> np.isreal(a)  
array([ True,  True])