To find the position of the elements which are same in vector
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I have a vector like this: a = [ 2 3 4 2 5 4 3 3]; and I want to find all the index of the elements which has the same value. output like this: # 2, [1 4] # 3, [2 7 8] # 4, [3 6] # 5, [5]
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per isakson
2012-9-12
编辑:per isakson
2012-9-12
Try
num = [ 2 3 4 2 5 4 3 3 ];
unq = unique( num );
ii = arrayfun( @(x) find( num==x ), unq, 'uni', false ) ;
>> unq
unq =
2 3 4 5
>> ii{:}
ans =
1 4
ans =
2 7 8
ans =
3 6
ans =
5
or use a for-loop
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