changing the name of the csv files but getting errors

Hi, I am basically using command below to change the name of the bunch of the files!

movefile('oldname.csv','newname.csv')

I tried on one file as shown below and it works

%movefile('vel.0.csv','vel0.csv')......basically I am using one of the post processing software which is exporting files in decimals and matlab is giving me an error while reading the files.... so I want to change the name or remove the points. I tried to loop it but I am getting an error as you can see below I have files from vel.0.csv to vel.201.csv all i want to remove an extra decimal point from them so ti should be like vel0.csv t0 vel201.csv

Code tried so far:

% Get all files in the current folder clear all;
files = dir(fullfile('C:','Users','muhammad','Desktop','Velocity','*.csv'));
% Loop through each
for ii = 1:length(files)
          movefile(vel.(ii).csv, vel(ii).csv'));
  end

Error:

Error: File: renameFiles.m Line: 9 Column: 47

Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for

mismatched delimiters.

Answer 1

[Walter Roberson]

folder = fullfile('C:','Users','muhammad','Desktop','Velocity');
files = dir( fullfile(folder, '*.csv') );
% Loop through each
for ii = 1:length(files)
    in_name = files(ii).name;
    %safety check instead of assuming there are definitely exactly two periods
    dp = find(in_name == '.');
    if length(dp) > 1
        out_name = in_name;
        out_name(dp(1:end-1)) = '';
        movefile( fullfile(folder, in_name), fullfile(folder, out_name));
    end
end

[muhammad choudhry]

Thanks alot! your replys help alot to me.

What is this line doing, if you can give me little bit of explanation I be really grateful

(dp(1:end-1)) = '' %is it reading vel.0.csv.....how does the code know which period to be removed..your code exactly remove the period before the numbers....

[Walter Roberson]

    dp = find(in_name == '.');

is comparing character by character looking for periods, and the find() around that returns a list of indices where the periods are. dp(1:end-1) is then a list of where all the periods are except for the last one.

    dp(1:end-1)) = '';

is then deleting all the positions corresponding to those periods.

This code does not assume that there are exactly 2 periods: it checks to be sure there are more than 1, and it removes all but the last one.