scipy.stats.mstats.hmean¶
- scipy.stats.mstats.hmean(a, axis=0)[source]¶
Calculates the harmonic mean along the specified axis.
That is: n / (1/x1 + 1/x2 + ... + 1/xn)
Parameters : a : array_like
Input array, masked array or object that can be converted to an array.
axis : int, optional, default axis=0
Axis along which the harmonic mean is computed.
dtype : dtype, optional
Type of the returned array and of the accumulator in which the elements are summed. If dtype is not specified, it defaults to the dtype of a, unless a has an integer dtype with a precision less than that of the default platform integer. In that case, the default platform integer is used.
Returns : hmean : ndarray
see dtype parameter above
See also
- numpy.mean
- Arithmetic average
- numpy.average
- Weighted average
- gmean
- Geometric mean
Notes
The harmonic mean is computed over a single dimension of the input array, axis=0 by default, or all values in the array if axis=None. float64 intermediate and return values are used for integer inputs.
Use masked arrays to ignore any non-finite values in the input or that arise in the calculations such as Not a Number and infinity.
