I have a matrix which is 1000 columns and 3621 rows, how do I take the mean of each row?

Basically I want to turn my matrix from dimensions 3621x1000 into 3621x1 by taking the means of each row.

Thank you for your help.

[champions2015]

try mean(M,2) where M is your matrix

Answer 1

[Jacob Ward]

In general, if you have a matrix A and want to take the mean across a certain dimension, dim, you should use mean(A,dim).

dim = 1 gives the mean for each column, dim = 2 gives the mean for each row, and so on.

Here's an example for your case:

M = rand(3621,1000);
size(M)

ans =

         3621        1000

meanOfEachRow = mean(M,2)
size(meanOfEachRow)

ans =

         3621           1

[Henn]

Thank you :)

Answer 2

[Ahmed Grera]

clc
clear all
a=[1 2 3;4 5 6;7 8 9]  % Replace this matrix with your matrix
mean(a,2)

[Ahmed Grera]

wishing you good luck

[Henn]

Thanks :)