MATLAB: Matrix Averaging

averaging

Hi, I'm trying to do something very simple, but can't seem to get the if condition correct.

I want to find the average of (:,2:5) if the values in the first column of the matrix are below a certain average.

Thanks in advance,

Ready to be humbled—

Best Answer

If A is your matrix and tol stands for "a certain average,"

if mean(A(:,1))<tol
   M = mean(A(:,2:5));
end

Related Solutions

MATLAB: HOW TO TAKE AVERAGE OF ROW AND COLUMN AT SOME POINT

This works:

M = [2 5 3 500  4  5
     3 4 2   2  3  5
     4 5 5   1  2  2];
[r,c] = find(M == 500);
RowAvg = mean(M(r,M(r,:)~=500));
ColAvg = mean(M(M(:,c)~=500,c));

MATLAB: How to automate the sequence of code

If all of the answers are to be stored in Num_mean then why do you bother calculating the means until you know they will be used?

if A > B
  x = calculation
  if C > D
    x = calculation2
  end
end

is faster as

if A > B
  if C > D
    x = calculation2
  else
    x = calculation1
  end
end

Best Answer

Related Solutions

MATLAB: HOW TO TAKE AVERAGE OF ROW AND COLUMN AT SOME POINT

MATLAB: How to automate the sequence of code

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