MATLAB: Find value in interpolated data

Question

Assume I have a vector of data y(nx1) which correspond to a time vector t(nx1).

What I need is some way to find a certain value of y for an arbitrary point of time. Lets say t covers a timespan of 0 to 10 seconds. I want to get the corresponding value of y for t=2.334.

Now if there is a t=2.334 exactly in the time vector I could find the corresponding entry in y. But if one entry reads t=2.1 and the next t=2.5 I don't have a corresponding value.

I would like to interpolate y so that I can find a value for any given time.

However I am fairly new to Matlab. Could someone tell me how to do this the best way?

Answer 1

Use interp1. It's exactly what you need

yi = interp1(t,y,2.2334);