How to substitute some elements from a vector

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Viridiana Torres
Viridiana Torres 2016-5-10
回答： Andrei Bobrov 2016-5-10
Hello everyone!
If i have the next vector Z=[10;10;10;11;11;13;13] which is associated to another vector: X=[1;6;65;34;21;73;14] a nd I want to create a third vector, Y, with almost all the elements in X, but just replacing a 0 in X BEFORE the element (i,j) from Z changes. How can I do this? In this example my desire outcome would be the next vector Y=[1;6;0;34;0;73;14]
Thanks a lot for your help!

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2016-5-10
Y = X;
Y([diff(Z(:))~=0;false]) = 0

更多回答（1 个）

Star Strider
Star Strider 2016-5-10
编辑：Star Strider 2016-5-10
This works:
Z=[10;10;10;11;11;13;13];
X=[1;6;65;34;21;73;14];
idx = diff([Z; 0]) > 0; % Logical Vector Detecting Transitions
Y = zeros(size(X));
Y(~idx) = X(~idx)
Y =
1
6
0
34
0
73
14
EDIT — Added output result for Y.

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