chainer.functions.polygamma¶

chainer.functions.polygamma(n, x)[source]¶

Polygamma function.

Note

Forward computation in CPU can not be done if SciPy is not available.

Parameters:	n (`Variable` or `numpy.ndarray` or `cupy.ndarray`) – Input variable. x (`Variable` or `numpy.ndarray` or `cupy.ndarray`) – Input variable.
Returns:	Output variable.
Return type:	Variable