changing the name of multiple csv files in a folder

21 views (last 30 days)
I have a folder containing 3000 csv files. All of these are named in the format: cor0.1 sc10 fc0.1_0.csv.
I want to change the name of all of these files to c0_1f0_1_0.csv.
Is there a way i can write a loop to do this for me?

Accepted Answer

Mathieu NOE
Mathieu NOE on 15 Jan 2021
this is a first attempt
I prefered to create the renamed copies in a separate folder
also my code will probably need some upgrade as I don't know how the numberring inside your filenames can evolve among your 3000 files
d = dir('*.csv')
dir_out = [cd '\out']
for ci = 1:numel(d)
filename = d(ci).name;
ind_und = strfind(filename,'_'); % search underscores
ind_dot = strfind(filename,'.'); % search dots
ind_f = strfind(filename,'f'); % search "f"
new_filename = [filename(1) filename(ind_dot(1)-1) '_' filename(ind_dot(1)+1) filename(ind_f ),...
filename(ind_dot(2)-1) '_' filename(ind_dot(2)+1) '_' filename(end-4:end)];
Stephen23 on 15 Jan 2021
Rather than fragile indexing, it better to use fileparts to split the filename and file extension:

Sign in to comment.

More Answers (1)

Matt Gaidica
Matt Gaidica on 15 Jan 2021
Edited: Matt Gaidica on 15 Jan 2021
csvPath = '/path/to/files';
filelist = dir(fullfile(csvPath,'*.csv'));
for iFile = 1:numel(fileList)
thisFile = fullfile(csvPath,fileList(iFile).name);
movefile(thisFile, strrep(thisFile,'old','new'));
This is just psuedocode. I don't quite see how you're mapping the old filename to the new one, so I just placed a string replace function in the loop. If you need help on that piece, please post more details.
C.G. on 15 Jan 2021
Edited: C.G. on 15 Jan 2021
I understand sprintf, but i am struggling to write a loop to do this.
I have started using Mathieu's code below, but this reaches 10 iterations and stops even though it identifies 3001 csv's

Sign in to comment.


Find more on Characters and Strings in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!