MATLAB: How to calculate the mean of each row from several columns

columnsmeanrows

I have 3 columns as three separate variables in the workspace. I want to find the mean of each row to create a new column of averaged values.

a = rand(10, 1);
b = rand(10, 1);
c = rand(10, 1);
m = (a + b + c) / 3

Or less efficient:

m = mean([a, b, c], 2)

The row means would be calculated as the mean of dimension 2.

Try this:

A = rand(5);
Anew = A - mean(A,2);
Check = mean(Anew,2)                    % Confirm: Mean = 0

One way is simply with a for loop

A = randn(100,112);
for nn = 0:15    
    B(:,nn+1) = mean(A(:,nn*7+1:(nn+1)*7),2); 
end