Is there any Python function to calculate the harmonic mean of a list of numbers?

+1 vote

Best answer

You can use the **hmean()** function of* scipy.stats*. This function calculates the harmonic mean along the specified axis. i.e. **n / (1/x1 + 1/x2 + … + 1/xn)**

>>> from scipy.stats import hmean

>>> a=np.array([10,20,15])

>>> hmean(a)13.846153846153845

>>>

You can also apply this function to a 2D array.

>>> a=np.array([[1,2],[11,12],[21,22]])

>>> a

array([[ 1, 2],

[11, 12],

[21, 22]])

>>> hmean(a,axis=0)array([2.63498099, 4.77108434])

>>> hmean(a,axis=1)array([ 1.33333333, 11.47826087, 21.48837209])