How to find the vaule of a 2-D plot at certain point

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Julian M 2020-8-24

评论： Julian M 2020-8-26

I have drawn a 2-D plot using the attached data points in matlab.

I would like to find the exact value of the function at exact x coordinates such as 1.2, 1.3 and etc.

The exact value of the function at these points are not knwon.

Which function should I use to find the values?

Alan Stevens 2020-8-24

Use interp1 to interpolate between known values. Of course you can't guarantee exact values unless you know the exact form of the function!

Julian M 2020-8-26

I used interp1 function and it gave me very resoanable estimation.

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