How to open a directory in Matlab ? Like how do I make the code open a directory ?

I need to create a function to plot a matrix. But the matrix is a csv file.

On this purpose, I need to make the code open the directory where the files are. Than I need make the code open the files one by one and create a plot with each one of thoses files until the is no more files to plot.

I'm a beginner on Matlab (started today) so 'm kinda lost

% Root directory of the data files:

Folder = fullfile([Path]), ([folder_name]); % Subfolder inside;

% The directory will depend on the computer

% Select the data file :

[~,~,data] = readtable('[file_name]')

% The name of the file will change for all files

For some reasons I can't explain, the 2nd line isn't working and I don't think th others will

Answer 1

[Steven Lord]

I've copied and pasted your code commented out into this message so I can run some sections of code I wrote.

This line:

%{
% Root directory of the data files:
Folder = fullfile([Path]), ([folder_name]); % Subfolder inside;
%}

is the same as these two lines:

%{
Folder = fullfile([Path])
([folder_name]); % Subfolder inside;
%}

The first line calls fullfile but doesn't pass the folder name into fullfile. The second assigns the value of the variable folder_name to the variable ans but otherwise doesn't have an effect.

In order to call fullfile with the content of both the Path and folder_name variables, you should eliminate the unnecessary square brackets and parentheses.

% Corrected code that calls fullfile with two inputs
Path = matlabroot

Path = '/MATLAB'

folder_name = 'toolbox'

folder_name = 'toolbox'

Folder = fullfile(Path, folder_name)

Folder = '/MATLAB/toolbox'

Looking later in your code:

%{
% The directory will depend on the computer 
% Select the data file : 
[~,~,data] = readtable('[file_name]')
% The name of the file will change for all files
%}

This doesn't do what you think it does. It does not pass the contents of the variable name file_name into the readtable function. It passes the literal text [file_name] into readtable.

To pass the contents of the variable named file_name into the function, eliminate the single quotes and the square brackets.

%{
% Correct approach to pass file_name into readtable
[~, ~, data] = readtable(file_name)
%}