Date Interpolation, getting erro

Question

Veronica Vigil 2023-10-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2037111-date-interpolation-getting-erro

评论： Walter Roberson 2023-10-27

Hello! Someone a few months ago helped me interpolate data. I need to re-interpolate, and I am getting the following error:

Error using griddedInterpolant

Sample points must be sorted in ascending order.

>> InterpdatatableFlux

Error using griddedInterpolant

Sample points must be sorted in ascending order.

Error in interp2>makegriddedinterp (line 226)

F = griddedInterpolant(varargin{:});

Error in interp2 (line 134)

F = makegriddedinterp(X, Y, V, method,extrap);

Error in InterpdatatableFlux (line 18)

Ai = interp2(Xu,Yu,A,Xi,Yi);

Here's what I need:

I need this to interpolate the flux values between 0 and 10, 10 and 20...etc, and then between 300 and 310, and 310 and 320...etc. Only thing I changed from when it was working is the values have reduced (they were never in order), and added from 1200 to 1300.

Attached FluxData3 is the NEW data I need to interpolate. Also attached is my m file.

As I said, I had this working with old data and now it won't work or even plot. Help!!!???

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Answer 1

Walter Roberson 2023-10-23

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https://ww2.mathworks.cn/matlabcentral/answers/2037111-date-interpolation-getting-erro#answer_1338691

在 MATLAB Online 中打开

You have

yvar = T1{2:end,2};

That should be

yvar = T1{2:end,1};

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Veronica Vigil 2023-10-27

Thanks @Walter Roberson! That really helped my plot. I was getting a really funky plot. Last question, you may or may not know. My data has 1,10,20....180. My code (the previously attached) is only interpolating from 10, 20,...180. It's not interpolating from 0 to 10. Ideas?