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help with this loop

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Matt
Matt 2012-10-29
关闭： MATLAB Answer Bot 2021-8-20
Ok this is basically the code im trying to run. the basic jist is that it calculates the distance to all other points, then compares to a control field, calculates how many points are within that distance (in this case the radius of a circle). With this number i then want to calculate the probability (the final bit of the code after end(k)) this is where the problem is i think. If i individually put in values for i the code works, but im dealing with large data sets and its not really practice to individually in put 1-357 each time. When i run the loop however it doesnt work so im guess my issue is with the loop. can anyone help me out?
rccm = zeros(357,357);
Crccm = zeros(357,2537);
CNccm = zeros(357,2537);
Nccm = zeros(2537,1);
Prob = zeros(357,1);
for i=1:1:357
for j=1:1:357;
rccm(i,j) = sqrt((0.5*(jmag(i,1)-jmag(j,1)).^2)+((diffmag(i,1)-diffmag(j,1)).^2)+((diffmag2(i,1)-diffmag2(j,1)).^2));
hold on
end
srt = sort(rccm); %Put in value of the 15th star
r = transpose(srt(21,1:1:357)); %Radius of the 21 star
for k=1:1:2537;
Crccm(i,k) = sqrt((0.5*(jmag(i,1)-Cfjmag(k,1)).^2)+((diffmag(i,1)-Cfdiffmag(k,1)).^2)+((diffmag2(i,1)-Cfdiffmag2(k,1)).^2));
end
rcontr = transpose(Crccm);
%rcontr1 = sort(rcontr);
CNccm = rcontr(:,i) <= r(i,1); %rcontr = Crccm
Nccm(i) = sum(CNccm(1:2537,1));
Prob(i) = 1-((Nccm(i)/20)*(9/81));
hold on
end
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Matt
Matt 2012-10-29
they are all just different variables of type double. basically im expecting to get values between 0 and 1 for the probability for some reason i get values of 1 for everything except i values of 338-357 which doesnt make sense because when i put an i value of 1 in manually for example i get a non zero value
Matt
Matt 2012-10-29
the main issue i think is the
CNccm = rcontr(:,i) <= r(i,1);
i need CNccm to be a logical of size 2537x357
but at the moment its 2537x1 so with every loop it overwrites the previous logical array. If i can get it as a matrix then i can simply just use a value for i to sum each column. How do i create a logical array which contains all of the results for every loop?

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