Set vector elements of one vector to nonzero elements of another

Question

CP 2011-4-1

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/4554-set-vector-elements-of-one-vector-to-nonzero-elements-of-another

So I have two vectors:

v1, v2, both same size.

I want to find all the elements where v2 is not zero and set the corresponding elements in v1 to those values, while leaving the other elements in v1 untouched.

E.g.

v1=[1 2 3 4 5] v2=[1 0 1 1 0]

Code I need goes here

v1 --> [1 2 1 1 5]

Can I do this without loops? Thanks.

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Sean de Wolski 2011-4-1

Another example of a well written question!

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Answer 1

Sean de Wolski 2011-4-1

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/4554-set-vector-elements-of-one-vector-to-nonzero-elements-of-another#answer_6350

在 MATLAB Online 中打开

v1(logical(v2)) = v2(logical(v2));

or on two lines:

idx  = logical(v2);
v1(idx) = v2(idx);

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Answer 2

CP 2011-4-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/4554-set-vector-elements-of-one-vector-to-nonzero-elements-of-another#answer_6351

That gives a vector of the nonzero indices (e.g. [1 3 4] in the above example), but without looping through that resulting vector how can I set them to the values I need?

Edit: Ok the edited versions work. Thanks :)