While using save command, I wanna choose directory which files can be saved into it.

for example;

p = rand(1, 10)

q = ones(10)

save('pqfile.txt', 'p', 'q', '-ASCII') % in here I cannot choose the directory which pqfile will save into it. I wanna save this file another directory, can I choose a different path?

Answer 1

[Iain]

You need to provide save with the path. eg.

save('C:\here.txt','p','p','-ASCII');

Or you can save to where you're working then use copyfile to put it where you want.

Or you can change directory to where you want the data, save it as you have just now, then change directory back to where you started (loop up "cd" in help)

[sermet]

while working GUI, can users choose the path with dialog box?

[Iain]

Provided you can get the path the users choose into a variable, yes. - You can get the path from an edit box, or returned from "uigetdir", or even a full path and file name from "uiputfile" - look up the help on both to see what you want.

save([Path '\' filename],'p','q','-ASCII')

[sermet]

for example, my data is string=[1;2,3] which is string into listbox in GUI (after processing). I wanna save this data by clicking push button, I wanna open dialog box which enables users to write file name and choose path for saving the file with .txt format.

[Iain]

uiputfile is what you want to use to get the filename (and path). - The help documentation will tell you all about it.

Answer 2

[Image Analyst]

A fairly robust way if you're going to hard code in the folder:

folder = 'C:\Users\sermet\Documents'; % Or wherever
if exist(folder, 'dir') == 0
  % Make folder if it does not exist.
  mkdir(folder);
end
% Create full filename with the fullfile() function:
fullFileName = fullfile(folder, 'pqfile.txt');
save(fullFileName, 'p', 'q', '-ASCII');

Or, if you're going to have the user specify a file, try it this way:

% Have user browse for a file, from a specified "starting folder."
% For convenience in browsing, set a starting folder from which to browse.
startingFolder = 'C:\Program Files\MATLAB';
if ~exist(startingFolder, 'dir')
  % If that folder doesn't exist, just start in the current folder.
  startingFolder = pwd;
end
% Get the name of the file that the user wants to use.
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
if baseFileName == 0
  % User clicked the Cancel button.
  return;
end
fullFileName = fullfile(folder, baseFileName)
save(fullFileName, 'p', 'q', '-ASCII');

[sermet]

thank you