Import/plot data

Hello,

I am a kind of new Matlab user with some basic basic background. I am currently doing an experiment on SPR (Surface plasmon resonance) and Mr Luigi Cristofolini's script is perfect for analysis. However I do not know how to import (and plot with theoretical graph) experimental data. Here is the link to his script: http://www.mathworks.com/matlabcentral/fileexchange/13700-surface-plasmon-resonance-calculator/content/SPR_grafico.m

If anyone has any idea that would be very helpful, thank you in advance.

PS: Otherwise, my question would be: How can I plot some data taken from an excel file within a graph already plotted?

[Sven]

Your question is very vague. What I can gather you want to know:

1. How can I import excel data? (see "doc xlsread")

2. How can I plot data? (see "doc plot")

3. How can I plot onto an already-made graph? (see "doc hold")