Changing portions of variable names

This may be a very simple question but I have been struggling with it for a bit and would appreciate the help.

rawdatafile = dir('*.csv');
rawdata = rawdatafile.name;

RawDataMatrix = csvread(rawdata, 13,0);

dlmwrite( strcat(rawdata,'.dat'), RawDataMatrix)

I have some code that finds a .csv file and imports it then deletes the first 13 rows and I am wanting to save the matrix as the same filename except instead of .csv I want to save it as .dat. The current code I have above saves it as filename.csv.dat so I am wondering how to get rid of the '.csv' portion before I save it. Thanks for the help!

Answer 1

[Stephen23]

Use this as the new filename:

strrep(rawdata,'.csv','.dat')

Or more robustly:

[~,fnm] = fileparts(rawdata);
sprintf('%s.dat',fnm)