How to use interp1 to stretch out smaller vector to the size of larger vector?

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Zuha Yousuf 2019-9-30

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https://ww2.mathworks.cn/matlabcentral/answers/482931-how-to-use-interp1-to-stretch-out-smaller-vector-to-the-size-of-larger-vector

评论： SURESH KUMAR 2024-1-19

So I have two vectors, lets call them A and B. A is the smaller vector, and has 1260 columns. B is the larger vector and has 1778 columns. I want to take an average of both these vectors. This is being hard because they are different sizes. Is there a way for me to use interp1 so that I can stretch out the smaller vector to match the size of the larger vector? Any help would be really appreciated!

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Answer 1

John D'Errico 2019-9-30

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https://ww2.mathworks.cn/matlabcentral/answers/482931-how-to-use-interp1-to-stretch-out-smaller-vector-to-the-size-of-larger-vector#answer_394215

编辑：John D'Errico 2019-9-30

在 MATLAB Online 中打开

Assuming that you intend to create a vector of averages, do this:

Ahat = interp1(1:1260,A,linspace(1,1260,1778));
C = (Ahat + B)/2;

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Zuha Yousuf 2019-10-2

Thank you so much! You have no idea how much this has helped me!

SURESH KUMAR 2024-1-19

it helped me alot . I wanted to strech the time series data without changing the y axis values and it does perfectly however i had to come up with understading about the duration for which i wanted my expension.. Anyways Thanks

Here is my if anyone needs

powNew=interp1(1:legnth(A),A,linspace(1,legnth(A),legnth(A)+increasementYourValue))

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How to use interp1 to stretch out smaller vector to the size of larger vector?

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