storing data into a vector within nested for loop

im = imread(im);

im = im2bw(im);

s = size(im);

xtot = s(2);

ytot = s(1);

for xcount = 1:xtot,

    for ycount = 1:ytot,

        if im(ycount,xcount) == 1

            sqrt((xcount-coord(2)).^2+(ycount-coord(1)).^2)

        end

    end
end
end

bear with me, since i'm new to matlab.

i'm making this function to quickly calculate distances from a particular object to a known coordinate. i turned the object image into black and white, read the dimensions, then iterated along the image matrix searching for 1s (which are a part of the object). then i use the coordinates that come up as 1s and measure distance to the known coordinate. i need to store all the distances in one vector so i can take the minimum. input arguments were the image and the 2d coordinate. thanks for your help.

Answer 1

[Titus Edelhofer]

Hi,

usually I would not use a loop for this kind of operations: do the following instead:

[Xcount, Ycount] = meshgrid(1:xtot, 1:ytot);
distance = sqrt((Xcount-coord(2)).^2 + (Ycount-coord(1)).^2);

Now the matrix "distance" contains all distances...

Titus

[Michael]

awesome. that's exactly the function i needed to know.

thanks for your help!