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Question about finding y value for certain x value of a plot

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Hello, I have a question about data cursor. My data plot gives me a data cursor which goes by 0.5 for the x-axis values.
For example, when i move the curse right side, it goes like 0.5, 1.0, 1.5, 2.0...
Say I want to know the y-value at the x-value of 5.1
I guess the most simple way is to zoom in and see the value, but there are about 1 thousand data to work with.
Therefore, I want to give a commend that orders to give the y-value at certain x-value. If there isn't a data set, it would be nice to get the value of how the plot line is drawn for the points...(interpolation etc..)
How can I do that?

Risposta accettata

Ilham Hardy
Ilham Hardy il 25 Gen 2016
If you have your plot data,
desiredY = interp1(yourXaxisdata,yourYaxisdata,certainX);
  10 Commenti
Torsten il 10 Mar 2022
If X and Y are your data arrays and Xq are your query points, use
Yq = interp1(X,Y,Xq);

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