How do I save filenames in a for loop for later access?

I'm able to iterate through a given folder and display the names of all files. However, I want to save the names so did I can do work on each file. For example,

function fn = filnamn(katalog)
% displays the names of all files in given diretory
% Called with name of desired directory
fn = dir(katalog);
for k = 1:numel(fn)
  if ~fn(k).isdir
    disp(fn(k).name);
  end
end

After each iteration how would I "append" each file so did I can access them afterwards?

[Stephen23]

The loop is not required:

fn = dir(katalog);
fn = {fn(~[f.isdir]).name};

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

[Geeniee]

Thank you that is what I was looking for!

Answer 1

[madhan ravi]

C = cell(nnz(~fn(k).isdir), 1); % before loop
function C = filnamn(katalog)
% displays the names of all files in given diretory
% Called with name of desired directory
fn = dir(katalog);
for k = 1:numel(fn)
  if ~fn(k).isdir
     C{k} = fn(k).name;
  end
end

[Geeniee]

C is an empty cell with spaces available for each file? Or how should I interpret the first line?

[madhan ravi]

That's preallocation.

[Geeniee]

okey I appreciate the response but it did not solve my problem.

[Stephen23]

@madhan ravi: perhaps the function output should be changed to C.

[madhan ravi]

Thank you Stephen.