loading multiple mat files from a directory one by one, and running a script for them

Hi,

I need to execute the following steps in matlab:

1. Load a file (from a directory containing multiple files of interest). The order wouldn't matter. I just need to do it for all files, but one by one.
2. Run a predefined script on that mat file.
3. Save a variable
4. Delete all variables and load the next mat file with its new variables
5. Run the same process for the next mat file in the directory

Answer 1

[KSSV]

matfiles = dir('*.mat') ; 
N = length(matfiles) ; 
iwant = cell(N,1) ;  % to save output 
for i = 1:N
    load(matfiles(i).name)
    % do what you want, let out put be out
    iwant{i} = out
end

[Walid]

work fine, thanks !

Answer 2

[Image Analyst]

See the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

There are code samples in the FAQ to do it two different ways. In short,

matFiles = dir('*.mat') ; 
numFiles = length(matFiles) ; 
for k = 1 : numFiles
    % Get file name of one mat file.
    thisFileName = fullfile(pwd, matFiles(k).name);
    fprintf('Processing "%s".\n', thisFileName);
    % Load mat file variables.  Any prior ones will be overwritten.
    s = load(thisFileName) % This is a structure with all the variables on it as fields.
    % Now "Run a predefined script on that mat file."
    output(k) = PredefinedFunction(s);
end