How to callback and save a plot, as image in guide?

I have created a GUI with radio buttons which plots two graphs at a time in the interface. There is also a write results push button which when pushed stores data in excel sheet, along with this I also want to save the plots in the .jpeg format to the same folder. Since this has to be done once the button is pushed , I want a similar command like setappdata to set the plot with some specific name and later in the push button function I can getappdata and store using Imwrite. Please suggest a function to store the plot and then call back in another function.

Attached is the image of GUI

Answer 1

[Image Analyst]

See the FAQ: https://matlab.wikia.com/wiki/FAQ#How_do_I_save_my_figure.2C_axes.2C_or_image.3F_I.27m_having_trouble_with_the_built_in_MATLAB_functions.

In short, use export_fig like everyone else.

Answer 2

[Yudi]

Thank you for your immediate feedback. My real problem is not with exporting plot to png, its how to callback in another function.

As stated I am using multiple radio buttons to plot on same axes one by one code is as follows:

function radiobutton4_Callback(hObject, eventdata, handles)
time=getappdata(0,'time');
P3I=getappdata(0,'p3i');
P3V_G=getappdata(0,'p3v_g');
P3V_dev=getappdata(0,'p3v_dev');
axes(handles.axes8);
plot (time, P3I,'b', time, P3V_G,'g'); 
legend ('Inca', 'Vehicle');
title ('Back Pressure'); xlabel('Time (s)'); ylabel('P3 (mbar)');
image1=getframe(handles.axes8); % Here I wanted to set the plot to a frame
setappdata(hObject,'image1',image1); % Here I wanted to set it for callback. 
axes(handles.perdev);
plot (time, P3V_dev,'r')
title ('Back Pressure Deviation'); xlabel('Time (s)'); ylabel('P3 Deviation (%)');

Now that I have set the graphic I want to save it after pressing push button code is as follows:

function res_Callback(hObject, eventdata, handles)
res=getappdata(0,'res');
set(handles.result,'string','Storing Result . . .');
pause(1);
path=getappdata(0,'path');
image1=getappdata(hObject,'image1'); % Here I want to extract the image
imgpath=fullfile(path,'Figure1.jpg');
export_fig(image1,imgpath); % Here I am storing the image to file path, but its return error that argument is empty
file=fullfile(path,'Mass Correlation Result.xlsx');
xlswrite(file, res);
set(handles.result,'string','Results Saved');

It is not a complex problem but I am new to matalab, your help will be much appreciated.

[Image Analyst]

It could be that your using "path" as the name of your variable is causing problems. path is a built-in reserved variable that you should never overwrite/destroy. Call it "folder" and try again.

I also don't see any need for pause(1).

Also, you can use the more convenient OOP method of setting properties instead of using the old fashioned get() and set():

handles.result.String = 'Results Saved';