Hi,
MATLAB handles Touchstone files as S-Parameter objects, which require RF Toolbox to be extracted. To get the data from the .s2p file, you would need to use "rfdata.data" function which returns S-Parameter data as output.
The following link has an example which shows how to get the data from. s2p file using the rfdata.data function.
You could use below script to get the data from the file.
file = 'default.s2p'; %name of the file
h = read(rfdata.data,file); % read data from .s2p file
s = h.S_Parameters; %this will have all the necessary data
The following link explains about S-parameter objects in RF toolbox.
Once the data is extracted according to your requirements, you could use lorentzfit function present in the following link.
