Change values in vectors

Question

Io7 2023-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/1898285-change-values-in-vectors

评论： Vilém Frynta 2023-1-21

I have a vector like: V=[1,2,3,4,5,6] and I want to substitute any values above 3 with the previous value in the vector which is “2”. So I want to have V=[1,2,2,2,2,2]. How to do this? Thank you.

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Answer 1

Sulaymon Eshkabilov 2023-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/1898285-change-values-in-vectors#answer_1153565

编辑：Sulaymon Eshkabilov 2023-1-21

在 MATLAB Online 中打开

V=[1,2,3,4,5,6]
V = 1×6
     1     2     3     4     5     6
IDX = find(V>3);
V(IDX)=2
V = 1×6
     1     2     3     2     2     2
%% ALT. Way:
V=[1,2,3,4,5,6]
V = 1×6
     1     2     3     4     5     6
V(V>3)=2
V = 1×6
     1     2     3     2     2     2

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Answer 2

Vilém Frynta 2023-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/1898285-change-values-in-vectors#answer_1153570

If you want to apply it to this vector, it's not complicated. But if you wanted to apply it to a more complex vector where the numbers don't go in ascending order, it woudle be bit more complicated.

I almost did it for you, but then I realized this sounds like a homework.

Please try, then we may help you. Try using find and indexing.