How to search through Data in a Matrix to find a specific element using For Loops and if statements?

B

Answer 1

[ANKUR KUMAR]

Why do you wish to use for and if for searching the locations of SE? You can use without using for and if, and it would be very quick and short.

R12=randi(15,12,12)
SE=5

[xx,yy]=find(R12==SE);
[xx,yy]

But still if you wish to use for and if, below is the code you can use:

location=1;
for ii=1:size(R12,1)
    for jj=1:size(R12,2)
        index=R12(ii,jj)==SE;
        if index==1
            xx_index(location)=ii;
            yy_index(location)=jj;
            location=location+1;
        end
    end
end
[xx_index; yy_index]'

Hope this helps.

[Ro]

I am new to Matlab so yes, Thank you it helps. Question specified to find it using for loops and if.

It also specified to find SE=5 in the same R12 matrix using logical matrices.

Can you assist with that as well?

[ANKUR KUMAR]

Second part of the answer which I provided uses for and if to find SE using logical matrices.

What's your expected answer? Do you need the indices of the location of SE in R12 matrix?

[ANKUR KUMAR]

Yes, that is the logical part. The code gives you the x and y indices of the locations of SE elements in the R12 matrix.

[Ro]

Ok great! Thank You So much Ankur!