Fill in matrix using nested loop

Hello,

I am struggling to create the xyFit matrix below.

What I am trying to do is to fill in "0" when xx is below the xcrit value (3) and to fill in "1" when xx is at or above the xcrit value.

Here is what I have come up with so far:

Cap = 10;
xcrit = 3;

xx = Cap;
yy = Cap;
xyprob = ones(xx,yy)*0.1; %probability individual A encounters opponent B

xyFit = zeros(xx,yy); %building fitness matrix


for ii = 1:xx
    for jj = 1:yy
        if ii == 1:(xcrit-1)
            xyFit(ii,jj)==0
        else 
        xyFit(ii,jj)== 1
        end
    end
    end

Any help would be greatly appreciated!

Answer 1

[Star Strider]

I am not certain what you want to do.

Try this:

Cap = 10;
xcrit = 3;
xx = Cap;
yy = Cap;
xyprob = ones(xx,yy)*0.1; %probability individual A encounters opponent B
xyFit = zeros(xx,yy); %building fitness matrix
for ii = 1:xx
    for jj = 1:yy
        if ii < xcrit
            xyFit(ii,jj) = 0;
        else
            xyFit(ii,jj) = 1;
        end
    end
end

Theere are probably easier ways to do what you want (for example using ‘logical indexing’). Aside from that, note that the double-equal == is for the logical comparison for equailty, not for assignment. To assign a value to a variable, use only =.

.

[Macie Smith]

I'm not sure why I didn't think of using "<"... been looking at it for too long I guess. Thank you very much! Working now

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

.