Help with saving data in .txt file

Hi guys, I have a simple question about how to save data. Let's suppose I have two vectors, x and y; I want to save them as a .txt file having two columns given by x and y. I want also to decide the name of the file (e.g. 'myfile.txt') and the directory of the folder where I save the file (e.g. 'C:\\User\Desktop\MyFolder\') in the code. Thank you!

Answer 1

[Image Analyst]

Try this:

% Get the name of the file that the user wants to save.
startingFolder = userpath
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uiputfile(defaultFileName, 'Specify a file');
if baseFileName == 0
  % User clicked the Cancel button.
  return;
end
fullFileName = fullfile(folder, baseFileName)

fid = fopen(fullFullFileName, 'wt');
if fid ~= -1
  for row = 1 : length(x)
    fprintf(fid, '%f, %f\n', x(k), y(k));
  end
  fclose(fid);
end

[aurc89]

I tried like this:

% Get the name of the file that the user wants to save.
x=[1 2 3 4 5];
y=[2 4 6 8 10];
startingFolder = userpath
defaultFileName = fullfile(startingFolder, '*.*');
[baseFileName, folder] = uiputfile(defaultFileName, 'Specify a file');
if baseFileName == 0
  % User clicked the Cancel button.
  return;
end
fullFileName = fullfile(folder, baseFileName)

fid = fopen(fullFileName, 'wt');
if fid ~= -1
  for row = 1 : length(x)
    fprintf('%f, %f\n', x(row), y(row));
  end
  fclose(fid);
end

and, if 'mydata' is the name of the file I want to save, it returns:

startingFolder =

C:\Users\Documents\MATLAB;

fullFileName =

C:\Users\\Desktop\MyFolder\mydata

1.000000, 2.000000
2.000000, 4.000000
3.000000, 6.000000
4.000000, 8.000000
5.000000, 10.000000

but the file 'mydata' is empty!

[Image Analyst]

Try putting the file handle into fprintf:

fprintf(fid, '%f, %f\n', x(row), y(row));  % To file.
fprintf(1, '%f, %f\n', x(row), y(row)); % To command window.

[aurc89]

Thank you !