Intersection point of a graph and horizontal line

Hi,
i want to find the coordinates of a interseciton point of a graph and a horizontal line.

Is there an easy way to do it in Octave?
I heard it lacks a function that MatLab has which calculates that (idk if thats true tho).

Thanks in advance for answers,
Ben
xxxz.m (241 Bytes)

If the first gain variable is monotonic, then something like the following should work:

freq_intersect = interp1 (gain, freq, z, "linear") 
2 Likes

Works great!
Thanks so much