How to create files by changing name after checking existance

Hi,

I have a code that is capable of generating different arrays of geometry at each run. And I would like to store this arrays in a .csv or .txt file at each run. So basically,

• I run the code, then an array of numbers is generated and is stored under the name 'name_2D_1'
• Then each time I run the code again, it checks if there is already a file named 'name_2D_1' and if it's the case, he stores the data in a new file named 'name_2D_2', so basically, it creates a new file with an incremented file name at each run.

It's the first time I'm trying to do such a thing, so I don't exactly how to manipulate the syntax to achieve the steps I want to execute. Any help would be very much appreciated and I'm eager to learn.

This is what I have tried so far, but it's not working as the index incrementation is not correctly placed.

Thanks a lot in advance,

folder = 'C:\Users\username\Desktop\selectedfolder';
index = 1;
filename = 'name_2D_1';
% filename = fullfile(folder, baseFileName, '.txt');
while index < 500
    if exist(filename, 'file')
        k = sscanf(filename, '%f');
        k = k+1;
        formatSpec = 'name_2D_%d.txt';
        filename = sprintf(formatSpec,k)
        save(filename, 'average_line', '-ascii', '-double', '-tabs');
        index = index + 1 
    else
        break
    end
end

Answer 1

[Prabhanjan Mentla]

Hi,

Each time when the code run, it checks whether any existing files are present, starting from name_2D_1.txt.

folder = 'C:\Users\Username\Desktop\temp';
index = 1;
filename = 'name_2D_1.txt';

while index < 10
    if  exist(filename,'file')==0        % check if the fileexists with that name
        newfilename = sprintf('name_2D_%d.txt',index);
        save(newfilename);
    end 
    index = index + 1;                   % if file exists, then come here and search for next possible name
    filename = sprintf('name_2D_%d.txt',index);
end

The above code helps to check the existence condition prior to saving into folder.

Hope this helps.