MATLAB: How to compare two vectors and output the index

comparing vectors

For eg:
A = [60,600,15]
B = [60,512,30,13]
Now, take B(1) (60 here) and compare it with A(1)(60 here) If 60<=60 print index of A(i) ==> O/P should be 1. then increase A(i) += 1 so now B(1) should compare if it is <= A(2) 60<=512 yes true! so o/p = 2. It should compare all elements less than or equal to itself and output its index in a new vector.
Final output should be like this:
B(1) = [1,2];
B(2) = [2];
B(3) = [1,2];
B(4) = [1,2,3].

Best Answer

This is easy in just two lines using find and accumarray:
>> A = [60,600,15];
>> B = [60,512,30,13];
>> [R,C] = find(bsxfun(@le,B(:),A));
>> Z = accumarray(R,C,[],@(v){v});
>> Z{:}
ans =
   1
   2
ans =
   2
ans =
   1
   2
ans =
   1
   2
   3
Related Question