Code to rename fiiles

I am looking to rename files that are titled "Untitled.0001.jpg" to 1,2,3...,n.jpg

I have a bunch of files that get spit out from a program in that format, but just want to name them by a number. How would I go about doing that?

Answer 1

[Azzi Abdelmalek]

f='Untitled.0001.jpg'
nf=regexprep(f,'(\S+\.)(\d+)(\.jpg)','${num2str(str2num($2))}$3')

Or

f='Untitled4.0201.jpg'
nf=regexp(f,'[1-9]\d+\>.jpg','match','once')

To rename the file

folder='C:\Users\you\Documents\MATLAB' % folder where your jpg are located
filetype=fullfile(folder,'*.jpg')
file=dir(filetype)
filename={file.name}
for k=1:numel(file)
    f=filename{k}
    nf=regexp(f,'[1-9]\d+\>.jpg','match','once')
    move(fullfile(folder,f),fullfile(folder,nf))
end

[Image Analyst]

Use movefile() rather than move().

movefile('source','destination')

When source and destination have the same location, movefile renames source to destination.

[Michael Cimorelli]

This is my first time ever using MATLAB... So I input the code as a script and set the directory to the NameChange folder... What do I have to do to get this to run?

Completely unrelated, do you have any sights or anything to help learn MATLAB? I need it for school and really want to get proficient in it.

[Image Analyst]

To run, type the F5 key or click the green Run triangle on the tool ribbon.

To master MATLAB, see this http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab