Get data from plot at specific points not available in the original data.

Here sections for my x and y data:

X:

0, 0.048522, 0.097044, 0.145566, 0.194088, 0.24261

and Y:

-0.626144, -3.172536, -2.938785, -3.454333, -3.813695, -1.108578

I want to know the y value for specific x values, such as 0.04, 0.08, etc.

Edit: I have attached the whole data here if you want to take a look.

[Stephen23]

https://www.mathworks.com/help/matlab/interpolation.html

[ayat]

I did try to use the interpolation technique, but could not reach a good solution. I would appreciate it if you take a look at the data and see how can I get what I want.

Answer 1

[Rik]

What you want is impossible without fitting a function to your data. This can be achieved in many ways, for example by fitting a quadratic curve to your data with polyfit.

[ayat]

Oh damn it. Well, actually the data I posted is a part of the 400 point data. I have attached the data here.

[Rik]

My point still stands. You need to fit a function (or use a spline method) before you can interpolate data. That you have 400 points instead of 6 doesn't really matter (although it may improve the fit).