How to perform a single Matrix calculation and store result back into a vector or matrix

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Amishi
Amishi 2011-10-23
Hi, Everyone
I have written a code which calculates weighted distance in a single matrix. (similar to euclidean distance). I need to know how to store my results back into a matrix or vector instead of displaying it n times.
Here is my code
///////////////////////////
i=1;
j=2;
for i=1:4
for j=2:5
if((i~=j)&&(i<j))
d=0;
for k=1:6
sum=(data(j,k)-data(i,k))^2;
d=d+sum;
end
d=(0.25*d)^(1/2)
end
end
////////////////////
end
For example if I have a 5x6 matrix as given below
85 92 45 27 31 0
85 64 59 32 23 0
86 54 33 16 54 0
91 78 34 24 36 0
87 70 12 28 10 0
my results are displayed as
d =
16.3478
d =
23.6590
d =
9.8362
d =
22.4666
d =
22.3271
d =
16.5076
d =
24.6678
d =
15.7321
d =
26.3534
d =
17.7200
But I would like to store as
d=[ 16.3478; 23.6590; 9.8362; 22.4666; 22.3271; 16.5076; 24.6678; 15.7321; 26.3534; 17.7200]
Please If anyone could help me.

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2011-10-23
  1. "i=1; j=2;" is not needed based on your code.
  2. Don't use "sum" as the variable name. sum() is a built-in function.
Your code can be improved as the following:
data=rand(5,6);
[M,N]=size(data);
d=zeros(M*(M-1)/2,1);
count=0;
for i=1:M-1
for j=2:M
if((i~=j)&&(i<j))
count=count+1;
for k=1:N
d(count)=d(count)+(data(j,k)-data(i,k))^2;
end
d(count)=(0.25*d(count))^(1/2);
end
end
end

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