Constraints

Good Morning All,

I was wondering how it would be possible to apply constraints to a matrix. I will have a large matrix full of answers but I want to limit the answers.

For example let x,y,z be columns 1,2,3 of the matrix and i want to set limitations to 5<x<10, 0<y<4, and 6<z<12.

Any suggestions?

Thanks,

Mel

Answer 1

[the cyclist]

What do you want to do with the values that lie outside those limits? If you want to cap them, then you could do:

 >> x(x>10) = 10;
 >> x(x<5) = 5;

and similar for y and z.

If "A" is the matrix and x is the first column, as you say, then this means something like:

 >> A(A(:,1)>10,1) = 10;

etc.

Answer 2

[Andrei Bobrov]

xyz = randi([0 28],15,3)
llt = [5 0 6]
rlt = [10 4 12]
id = bsxfun(@lt,llt,xyz)&bsxfun(@gt,rlt,xyz)
out = arrayfun(@(i1)xyz(id(:,i1),i1),1:size(xyz,2),'un',0)