"save as" interface

Hi,

I trying to code in my MATLAB app a pop up "save as" interface, but it does not work and iam becoming desperate.

prompt = {'save as'};
dlgtitle = 'Input';
dims = [1 35];
definput = {'C:\myFolder\myFile.filename.txt'};
answer = inputdlg(prompt,dlgtitle,dims,definput);
path = string(answer);


hlavicka1 = '---------SOURADNICE BODU ORTODROMY---------';
hlavicka2 = 'c.b.        U[D M S]              V[D M S]';

fileID = fopen(path,'w');

fprintf(fileID,'%s\n',hlavicka1);
fprintf(fileID,'%s\n',hlavicka2);

...

Error call:

Error using fprintf

Invalid file identifier. Use fopen to generate a valid file identifier.

Answer 1

[Steven Lord]

Why not just use the uiputfile function included as part of MATLAB?

[Jakub Snopl]

because i did not know that this function exist :D, thank you

[Walter Roberson]

Either way, you should try to get accustomed to programming something along the lines of

[fileID, msg] = fopen(path, 'w');
if fileID < 0
   error('Could not open file "%s" because "%s"', path, msg);
end

Even in cases where you are sure that the user returned something that looks like a valid file name in a valid directory, you can't be sure that the fopen() will work -- the disk might be out of space, the disk might be read-only, the user might not have write permission...