Harmonic Mean Function in Python – pandas (Dataframe, Row and column wise harmonic mean)

Harmonic Mean Function in python pandas is used to calculate the harmonic mean of a given set of numbers, Harmonic mean of a data frame, Harmonic mean of column and Harmonic mean of rows. let’s see an example of each we need to use the package name “stats” from scipy in calculation of harmonic mean. In this tutorial we will learn,

  • How to find the harmonic mean of a given set of numbers
  • How to find harmonic mean of a dataframe
  • How to find the harmonic mean of a column in dataframe
  • How to find row wise harmonic mean of a dataframe

 

Harmonic Mean Function in Python

Simple harmonic mean function is shown below

# calculate harmonic mean
from scipy import stats

print(stats.hmean([1,9,5,6,6,7]))
print(stats.hmean([4,11,15,16,5,7]))

output:

3.35701598579
7.38068295281

 

Harmonic Mean of a dataframe:

Create dataframe

import pandas as pd
import numpy as np
from scipy import stats

#Create a DataFrame
d = {
    'Name':['Alisa','Bobby','Cathrine','Madonna','Rocky','Sebastian','Jaqluine',
   'Rahul','David','Andrew','Ajay','Teresa'],
   'Score1':[62,47,55,74,31,77,85,63,42,32,71,57],
   'Score2':[89,87,67,55,47,72,76,79,44,92,99,69]}


df = pd.DataFrame(d)
df

So the resultant dataframe will be

harmonic Mean Function in Python - pandas 1

Harmonic Mean of the column in dataframe:


# Harmonic Mean of the  column in dataframe
from scipy import stats

scipy.stats.hmean(df.iloc[:,1:3],axis=0)

axis=0 argument calculates the column wise harmonic mean of the dataframe so the result will be

array([ 52.4769906 , 68.56766396])

 

 

Row wise harmonic Mean of the dataframe:


# Row wise harmonic mean of the dataframe
from scipy import stats

scipy.stats.hmean(df.iloc[:,1:3],axis=1)

axis=1 argument calculates the row wise harmonic mean of the dataframe so the result will be

harmonic Mean Function in Python - pandas 2

 

Calculate the harmonic mean of the specific Column

# harmonic mean of the specific column
from scipy import stats

scipy.stats.hmean(df.loc[:,"Score1"])	

the above code calculates the harmonic mean of the “Score1” column so the result will be

52.476990604079674

 

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