Replace some values of a vector with another vector which has a different size
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Hello
I've got the vector: source = [ 0 0 1 0 1]
and the vector a = [2 3],
which has a different size to source.
I'd like to replace in the source vector the elements that are equal to 1, with those of vector a.
The final vector b should be: b = [0 0 2 0 3]
Any thoughts on this?
Thank you!
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pfb
2015-4-29
b=zeros(size(source));
b(find(source))=a;
of course this works only if the number of nonzero elements in source are the same as the elements in a.
>> A = [ 0 0 1 0 1];
>> B = [ 2 3];
>> A(A==1) = B
A = 0 0 2 0 3
On my computer this was almost twice as fast compared to using find and zeros.
3 个评论
Christina
2015-4-29
James Tursa
2015-4-29
Stephen switched nomenclature. His starting "A" is your "source" his "B" is your "a", and his resulting "A" is your "b".
Stephen23
2015-4-29
Guilty as charged.
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