How to replace some elements from a vector using if

2016 5 6
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更新时间：2016 5 6
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Hello everyone!
If i have a vector, lets say L=[10;10;10;11;11;13;13] which is associated to another vector X=[1;6;65;34;21;73;14] and I want to create a third vector, Z, with almost all the elements in X, but just replacing a 0 in X when the element (i,j) from L changes. Lets say that the result that I want should look like this Z=[1;6;65;0;21;0;14]
Any ideas how to solve this?
I would be really thankful :)

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回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-5-6

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[~,jj]=unique(L)
out=X;
out(jj(2:end))=0

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angelavtc
angelavtc 2016-5-6
Thanks Azzi but this is giving me the next vector
Out=[1;6;65;34;0;73;0] and not Z=[1;6;65;0;21;0;14]
any suggestions?
Thanks

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