Error with interp1?

Question

Shayma Al Ali 2021-8-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1440134-error-with-interp1

评论： David Goodmanson 2021-8-24

I have a variable, u10_B1B3, that is 851x1. I want it to be the same length as another variable, wc_B1B3, which is 7414x1, so I can plot the two against each other. I have tried interpolating the variable u10_B1B3 with the following line of code:

u10_B1B3=interp1(u10sdate,u10_B1B3,wcdate_B1B3,'nearest','extrap'); %interpolate u10_B1B3

where u10sdate is the dates corresponding to the u10_B1B3 data and wcdate_B1B3 are the dates corresponding to the wc_B1B3 data. However, I get the following error when I try to run it:

Error using interp1>reshapeAndSortXandV (line 445)

X and V must be of the same length.

Error in interp1 (line 128)

[X,V,orig_size_v] = reshapeAndSortXandV(X,V);

Error in datetime/interp1 (line 167)

vq = interp1(x,v,xq,method,extrapVal);

What can I do to fix the problem? Can I use another function instead of interp1?

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David Goodmanson 2021-8-24

Hi Shayma,

Interp1 is saying that the lengths of u10sdate and u10_B1B3 don't match. So, what are those two lengths?

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Answer 1

the cyclist 2021-8-24

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1440134-error-with-interp1#answer_773819

You state "u10sdate is the dates corresponding to the u10_B1B3 data", but the error you are getting implies that u10sdate and u10_B1B3 are not the same length (so it is difficult for me to understand how they can correspond to each other).

Can you upload the data here, in a MAT file?