How to specify points in on two curves in plot?

Hey guys. if my λ = 58.5 ( in x-axis), how can i get both different amounts of "σ cr" on those curves?

Also another question: Amounts in "σ cr" axis are seprated from each other (there's no interval between them. Same goes for λ axis. Both are imported from an excel file) How can i glue them togethor to get exact amounts of σcr for my λ = 58.2?

Sorry for my bad english and thank you for your time :)

Answer 1

[Bjorn Gustavsson]

This seems like a task for interp1. Have a look at the help and documentation for that function. I'd do something like this:

scr1_58.5 = interp1(lambda,sigmacr,58.5);

Should work for both the case where sigmacr is a 2-by-number-of-wavelength-samples and a similar 1-D array (then you'd have to repeat the operation for the other sigma.)

HTH

[Mahdi Ghorbani]

You sir just made my day! It worked. I tried interp1 before but it seems i didnt use it properly before. But your code worked perjectly fine. Thank you.

scr1_LandaT = interp1(Landa_t,stress_Vector_modified,Landa)
scr1_LandaR = interp1(Landa_r,stress_Vector_modified,Landa)