mean() – Mean Function in python pandas is used to calculate the arithmetic mean of a given set of numbers, mean of a data frame ,column wise mean or mean of column in pandas and row wise mean or mean of rows in pandas , lets see an example of each . We need to use the package name “statistics” in calculation of mean. In this tutorial we will learn,
- How to find the mean of a given set of numbers
- How to find mean of a dataframe in pandas python
- How to find the mean of a column in dataframe in pandas python
- How to find row mean of a dataframe in pandas python
Syntax of Mean Function in python pandas
Parameters :
axis : {rows (0), columns (1)}
skipna : Exclude NA/null values when computing the result
level : If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a Series
numeric_only : Include only float, int, boolean columns. If None, will attempt to use everything, then use only numeric data. Not implemented for Series.
Mean Function in Python
Simple mean function is shown below
# calculate arithmetic mean Import statistics print(statistics.mean([1,9,5,6,6,7])) print(statistics.mean([4,-11,-5,16,5,7]))
output:
2.66666666667
Mean of a dataframe in pandas python:
Create dataframe
import pandas as pd
import numpy as np
#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
Mean of the dataframe in pandas:
# mean of the dataframe df.mean()
it will calculate the mean of the dataframe across columns so the output will be
Score2 73.0
dtype: float64
Column Mean of the dataframe in pandas python:
# column mean of the dataframe df.mean(axis=0)
axis=0 argument calculates the column wise mean of the dataframe so the result will be
Score2 73.0
dtype: float64
Row Mean of the dataframe in pandas python:
# Row mean of the dataframe df.mean(axis=1)
axis=1 argument calculates the row wise mean of the dataframe so the result will be
Calculate the mean of the specific Column in pandas
# mean of the specific column df.loc[:,"Score1"].mean()
the above code calculates the mean of the “Score1” column so the result will be
