How to substitute some elements from a vector
显示 更早的评论
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!
采纳的回答
Andrei Bobrov
2016-5-10
Y = X;
Y([diff(Z(:))~=0;false]) = 0
更多回答（1 个）
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.
类别
在 帮助中心 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
