dpnp.proj

dpnp.proj(x, /, out=None, *, order='K', where=True, dtype=None, subok=True, **kwargs)

Returns the projection of a number onto the Riemann sphere.

For all infinite complex numbers (including the cases where one component is infinite and the other is NaN), the function returns (inf, 0.0) or (inf, -0.0). For finite complex numbers, the input is returned. All real-valued numbers are treated as complex numbers with positive zero imaginary part.

Returns:

out – The projection of each element of x.

Return type:

dpnp.ndarray

Limitations

Parameters x is only supported as either dpnp.ndarray or dpctl.tensor.usm_ndarray. Parameters where, dtype and subok are supported with their default values. Keyword argument kwargs is currently unsupported. Input array data types are limited by supported DPNP Data types.

See also

dpnp.absolute

Returns the magnitude of a complex number, element-wise.

dpnp.conj

Return the complex conjugate, element-wise.

Examples

>>> import dpnp as np
>>> np.proj(np.array([1, -2.3, 2.1-1.7j]))
array([ 1. +0.j, -2.3+0.j,  2.1-1.7.j])

>>> np.proj(np.array([complex(1,np.inf), complex(1,-np.inf), complex(np.inf,-1),]))
array([inf+0.j, inf-0.j, inf-0.j])