CODEWITHSUNDEEP
pythonpandasnumpy
Mahesh
Mahesh

Reputation: 141

Calculating geometric mean of elach element in series

I have four Series objects nSer1, nSer2, nSer3 and nSer4. How to create nSerGMean which multiplies the series and takes the fourth root of the result.

nSerGMean=(nSer1*nSer2*nSer3*nSer4)^(1/4)

Upvotes: 0

Views: 95

Answers (2)

Bharath M Shetty
Bharath M Shetty

Reputation: 30605

Use mul and pow methods i.e: 

nSerGMean = (nSer1.mul(nSer2).mul(nSer3).mul(nSer4)).pow(1/4)

Upvotes: 1

shouldsee
shouldsee

Reputation: 484

You can use numpy product along a specific dimension.

import numpy as np
nSerGMean = np.power(np.prod([nSer1,nSer2,nSer3,nSer4], axis = 0),0.25)

Optionally, you can do a log-transformation first to use summation instead.

nSerGMean = np.exp(
    np.mean( np.log([nSer1,nSer2,nSer3,nSer4]), axis = 0) 
    )

Upvotes: 3

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