How to append a string to a filename when saving a file?

How do I append a string to the filename and save the file in the case of saveas and save? The following isn't quite right, so I'd appreciate some insight.

[~,f,ext] = fileparts(files(id).name); % extract file name without original extension
% do some calculations and generate a plot based on the original file
str_saveas = sprintf(str_saveas,f);
saveas(fig,'str_saveas','png')

And similarly, for the save function.

[Geoff Hayes]

@O.G. what is

str_saveas

? If you just want to append two string variables together, you could use the square brackets as

str_saveas = [str_saveas f];

sprintf would be used more like

str_saveas = sprintf('%s%s', str_saveas, f);

Answer 1

[Les Beckham]

This should get you closer to what you want to do

[~,f,ext] = fileparts(files(id).name); % extract file name without original extension
% do some calculations and generate a plot based on the original file
str_append = 'text_that_you_want_to_add';
str_saveas = sprintf('%s_%s', f, str_append); % add the appended string to the original filename
saveas(fig, str_saveas, 'png') % note no quotes on the filename since it is a variable

[L'O.G.]

Thanks!

[Les Beckham]

You are welcome.