Uiputfile problem - how do i tell callback which file I want it to save?

I have a GUI (made with GUIDE) that processes images and returns an output to a result axes (result-axes). I now want to get the user to save this resultant file using uiputfile. The code I am using is

[filename,pathname] = uiputfile('*.mat','Save As...');

What code do I add now to point the program to the result_axes and export the file that now appears there so that the user can save it? I'm guessing its something to do with (gcf, handles.result_axes) but apart from that I am not sure.

Any help would be most welcome Sue x

Answer 1

[Fangjun Jiang]

Assume you have your processed image data in a variable called ImageData (I am creating some data to explain it). The following will save the data to an .mat file.

ImageData=magic(100);
save(fullfile(pathname,filename),'ImageData');

[Sue]

Please excuse my ignorance but I am knew to all this.

The code you've given me - does it go after what I already have or as well as?

And in your code where it says 'handle' would I put 'handle.result_axes'? And where you put 'bmp' I would change it

to 'mat' I guess. Is there anything else I need to change?

Sue x

[Sue]

Oops! new and not knew!!

[Fangjun Jiang]

You are doing image processing and then show the image in an axes. Do you want to save the processed image data, or do you want to save the figure showing the image?

[Fangjun Jiang]

Okay, maybe your uiputfile() should already give the hint. I assume you want to save the data. See the updated answer.

[Sue]

Umm, the processed data is not in a variable (I think), it is just being copied from the resultant output from a function m-file that runs when the user presses a pushbutton. I do not want the data to be automatically saved, I want the data to be saved when the user requests it, with a filename they decide.

[Fangjun Jiang]

Well, you are almost there. You've found the uiputfile() which allows you to let user pick a file. The command to save the data to a .mat file is save(). You just need to find the data next.

[Sue]

Exactly, I need to find the data.

Well the data is the output that is now showing in my result_axes. How do i collect this data? save(gcf,handles.result_axes,'*.mat')?

[Fangjun Jiang]

It's better to dig into the M code to find the data. If not, you might be able to get the data from the axes. It may depend on what figure do you have. e.g.

handle=image(magic(10));

ImageData=get(handle,'CData');

[Sue]

You've lost me now :-)

[Fangjun Jiang]

Okay, you want to save the data, right? The best way is to find that original data in the code and use save() command to save it. If you can't find it but you have the handle of the image figure, you could get the data from the image figure and then save it. magic() function is to create some data as an example, image(magic(10)) puts it in a figure. Next line is to get the data. If you have the handle if your axes, why don't you try: ImageData=get(handles.result_axes,'CData')