mean from intersection matrix

4 views (last 30 days)
eko supriyadi
eko supriyadi on 16 Oct 2021
Commented: eko supriyadi on 16 Oct 2021
Hi matlab community
Suppose i have matrix:
a = [1,3,3,2,2,3,3,4,3,1,3];
b = [1,1,1,3,4,1,2,1,4,1,1];
c = [2,2,2,4,2,3,3,2,1,3,8];
now, I want to get the mean value (from matrix c) of the intersection of matrices [ab] which have the same value, like this:
a = [1,3,2,2,3,4,3];
b = [1,1,3,4,2,1,4];
c = [2.5,3.75,4,2,3,2,1]; %final result
how to do it? tks :)

Accepted Answer

Ive J
Ive J on 16 Oct 2021
This should work:
a = [1,3,3,2,2,3,3,4,3,1,3];
b = [1,1,1,3,4,1,2,1,4,1,1];
c = [2,2,2,4,2,3,3,2,1,3,8];
x = [a; b];
[~, ia, ic] = unique(x.', 'stable', 'rows');
newC = arrayfun(@(x) mean(c(ic == x)), unique(ic)).'
newC = 1×7
2.5000 3.7500 4.0000 2.0000 3.0000 2.0000 1.0000
  1 Comment
eko supriyadi
eko supriyadi on 16 Oct 2021
interesting answer, next is:
d=[a(ia)' b(ia)' newC].';
then if there is another method can be replied here.. tks Ive

Sign in to comment.

More Answers (0)

Categories

Find more on MATLAB in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!