Find maximum of all rows without a for-loop?

2 views (last 30 days)
Hi,
I am relatively new to Matlab and only used to work with for-loops which I've already used succesfully to find the maximum in each row of my three column vectors (300X1):
for i=1:length(value_A)
test(i) = max([value_A(i),value_B(i),value_C(i)]);
end
Since this is not a very elegant and efficient way (for loop) I'm wondering how I can achieve the same result without a for loop.
Many thank in advance!
  2 Comments
Stephen23
Stephen23 on 15 Apr 2020
Edited: Stephen23 on 15 Apr 2020
" ...three row vectors (300X1)"
A row vector has size 1xN
A column vector has size Nx1
buhmatlab
buhmatlab on 15 Apr 2020
Sorry, my bad: column vector is correct

Sign in to comment.

Accepted Answer

Stephen23
Stephen23 on 15 Apr 2020
Edited: Stephen23 on 15 Apr 2020
Assuming that your three vectors have size 1xN (i.e. row vectors):
M = [value_A;value_B;value_C];
T = max(M,[],1)
Assuming that your three vectors have size Nx1 (i.e. column vectors):
M = [value_A,value_B,value_C];
T = max(M,[],2)
For vectors of any orientation:
M = [value_A(:),value_B(:),value_C(:)];
T = max(M,[],2)
  1 Comment
buhmatlab
buhmatlab on 15 Apr 2020
Thank you! Sorry I meant column vector, edited the original question.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!