MATLAB: How to rename multiple files in a folder with variable names depending on their names in another folder

findregexp

I have several files in a directory (some examples of the names of the files are commented under the commented word (oldnames)), and I want to rename them as the commented ones ( under the commented word (newnames)). So I want to extract every number that has 4 digits (e.g., (3185)) and use it to rename the new files. I tried to extract the numbers that have 4 digits as below but it didn't work. Any suggesstions?
projectdir = 'C:\Users\Abdelrahman\Downloads\Documents\CIV312_Test';
oldfiles = dir( fullfile(projectdir, '*3*.pdf') );
oldnames = {oldfiles.name};
myindices = cellfun(@isempty,regexp(oldnames,'*3\d\d\d*','match'));  % didn't work
% oldnames
% (CIV-312-3154)_Template.pdf
% 3140_CIV312.pdf
% CIV _312_3085.pdf
% CIV-312-3051.pdf
% newnames
% CIV_312_3154.pdf 
% CIV_312_3140.pdf
% CIV_312_3085.pdf
% CIV_312_3051.pdf

Best Answer

You dont need the *. you can do as follows.
match = regexp(oldnames,'3\d{3}','match');
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