Save Structure to .mat-file in dialog via GUI

Hi everyone,

I have a GUI made in app designer in which I create a large structure with a lot of data. I now want to export/save the structure by klicking a button. This button should open a dialog in which the user is able to create a new file or to overwrite an existing file.

uisave();

and

struct = uisetfile;

are not working.

uisave() doesn't work with a structure and uisetfile requires an already existing file to write to. Is there a way to simply take that structure and write it in a .mat-file? It's not necessary to save as .mat but I think to afterwards load the data it would be the easiest way to save as .mat?!

Answer 1

[Stephen23]

S = .. your big structure
[F,P] = uiputfile('*.mat');
save(fullfile(P,F),'-struct','S') % if S is scalar
save(fullfile(P,F),'S') % if S is non-scalar

Don't forget when loading it is strongly recommended to load into an output variable:

S = load(..)

[Dominik Müller]

Tanks for your answer. If I try it this way, I get the following error:

Error using save 'app.S' is not a valid variable name.

My structure is declared as a private propertie of my GUI.

save(fullfile(P,F),'app.S')

[Rik]

You should first make it a separate variable:

S = app.S;
[F,P] = uiputfile('*.mat');
save(fullfile(P,F),'-struct','S') % if S is scalar
save(fullfile(P,F),'S') % if S is non-scalar

[Dominik Müller]

Thanks a lot! Now it works perfectly!!!!!