Interpolation of matrices corresponding to time vector

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Ashok Das 2019-6-25

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https://ww2.mathworks.cn/matlabcentral/answers/468850-interpolation-of-matrices-corresponding-to-time-vector

评论： KALYAN ACHARJYA 2019-6-26

采纳的回答： Andrei Bobrov

I have a vector containing time points, and a cell structure containing matrices as its elements.

I want to interpolate the corresponding matrix for some time point which is not in the time vector. How to do that?

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infinity 2019-6-26

Hello,

You could try to look at this

https://it.mathworks.com/help/matlab/ref/interp1.html

maybe it will help.

Bjorn Gustavsson 2019-6-26

Or, depending on sizes, it might be more efficient to interpolate all matrix components at the same time with interp3, or interpn. The different interpolation functions have slightly different options when it comes to interpolation methods.

HTH

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采纳的回答

Andrei Bobrov 2019-6-26

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Variant with interp1:

t = [1, 2, 3];
A = {[1, 1; 1, 1]   ,[1, 0.9;0.95, .87] , [1.1, 0.85;0.91, .8]};
tt = [1.2, 2.1, 2.9];
out = interp1(t(:),permute(cat(3,A{:}),[3,2,1]),tt);
out = permute(out,3:-1:1);