How can I find the n smallest numbers in a two-dimensional array of m numbers?

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For example, with this 2x5 matrix (m=10 and n=4), the expected answer is
(2,9), (1,5), (1,3), (2,10)
111 , 112, 145, 212
236 245 145 244 112
225 232 266 111 212

Accepted Answer

Iman Ansari
Iman Ansari on 13 Apr 2013
Hi.
n=4;
a=[236 245 145 244 112; 225 232 266 111 212];
[r c]=size(a);
a = a';
vector=a(:);
[B,IX] = sort(vector);
[fix((IX(1:n)-1)./c)+1 IX(1:n)]

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