numpy.std(a, axis=None, dtype=None, out=None, ddof=0, keepdims=False) [source]
Compute the standard deviation along the specified axis. Returns the standard deviation, a measure of the spread of a distribution, of the array elements. The standard deviation is computed for the flattened array by default, otherwise over the specified axis. Parameters:
a : array_like Calculate the standard deviation of these values. axis : None or int or tuple of ints, optional Axis or axes along which the