Create a loop that performs calculation on 100 rows and moves to the next 100 rows in a matrix.

I have a matrix q= 11700x3 and want to perform the following calculation for every 100 rows and than it moves to next 100 rows

(e.g. From row 1 to 101, 102 to 202 and so on), so that will give a 117x1 matrix (vector).

The following code gives a value for the first 100 rows only.

% q=matrix of size 11700x3

n=100;

ANS=0;

for i=1:(n-1)

for j=2:n

v=[q(i,:)-q(j,:)].^2;

ANS=ANS+v;

rsum=ANS(:,1)+ANS(:,2)+ANS(:,3);

rsqt=sqrt(rsum);

end

end

dc=(2/((n-1)*(n)))*rsqt

Thanks in advance.

Answer 1

[Torsten]

n = 100;
m = 11700/n;
dc = zeros(m,1);
for count = 1:m
    M = q((count-1)*n+1:count*n,:);
    summe = 0.0;
    for i = 1:n-1
        for j = i+1:n
            summe = summe + sqrt( (M(i,1)-M(j,1))^2 + (M(i,2)-M(j,2))^2 + (M(i,3)-M(j,3))^2 );
        end
    end
    dc(count) = summe * 2/(n*(n-1));
end

[Yaseen]

Thanks a millon!