MATLAB: Find a mean value for specific rows

mathematicsmean

Hello,

I have a data 500000×5 and I need to find a mean value of specific rows. For example the mean of the rows between 100 and 120.

Does anyone knows how to do this?

Thanks in advnace.

Best Answer

To find the mean for specific rows of matrix A:

MyMean = mean (A(:,(100:120)),2);

Related Solutions

MATLAB: Finding a specific rows

This does not require a for-loop. In fact, the last line is the solution. The first few lines just creates an example matrix where rows 3 and 13 are all below 10.

% Create a 15x7 matrix of random integers 1:20
m = randi(20,15,7); 
% Rows 3 and 13 are all below 10 (maybe others, too)
m([3,13],:) = m([3,13],:)-11; 
%find the first row where all the columns have a value below 10.
rowNumber = find(all(m < 10,2),1);
% find the first row AFTER ROW N where all columns are < 10
N = 3;  %start at row N
rowNumber = find(all(m(N:end,:) < 10,2),1)+N-1;

MATLAB: How to compute the mean and the standard deviation of a specific row from a matrix

M = mean(x(end,:))
S = std(x(end.:))
histogram(x(:))

Best Answer

Related Solutions

MATLAB: Finding a specific rows

MATLAB: How to compute the mean and the standard deviation of a specific row from a matrix

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