Changing portions of variable names

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Noah Wilson
Noah Wilson 2019-7-1
编辑： Stephen23 2019-7-1
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!

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Stephen23
Stephen23 2019-7-1
编辑：Stephen23 2019-7-1
Use this as the new filename:
strrep(rawdata,'.csv','.dat')
Or more robustly:
[~,fnm] = fileparts(rawdata);
sprintf('%s.dat',fnm)

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