Saving a Figure from inside a GUI

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Rhys 2013-6-14

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Hi all!

I have been designing a few GUIs to make some data analysis easier. At the end process however I want to be able to save the created plot (and legend) with a push button. I have been looking over past questions and have seen a few ways to approach the problem. My current method of saving the plot is as follows

cd('F:\JLAB\Gui_output')
picname=input('Enter Name for Image: ','s')
saveas(handles.ax, picname, 'jpg')
cd(handles.CF)

The problem with this is that I take the whole GUI window instead of just the plot. The two other methods I have seen are the export_fig function and the copyobj method. With the export_fig function I cannot figure out how to tell it to take only the part that I want. With the copyobj method (copy the plot to a figure window and save it there) I cannot figure out how to properly use the function.

Additional info: When I created the axes I defined them with

handles.ax=axes('Outerposition',[.25, 0,0.8,0.8]);

Cheers, Rhys

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Answer 1

Image Analyst 2013-6-14

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With export_fig(), you can pass it the axes handle on your GUI if you want to save only the axes. Is that what you meant by "take only the part that I want"? Did you try to pass it the axes handles instead of the figure handle?

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Image Analyst 2013-6-14

在 MATLAB Online 中打开

Try this demo, where I use export_fig() to save both the whole figure, and just one of the axes on it.

clc;
close all;
workspace;
fontSize = 16;
% Read in a standard MATLAB color demo image.
folder = fullfile(matlabroot, '\toolbox\images\imdemos');
baseFileName = 'peppers.png';
% Get the full filename, with path prepended.
fullFileName = fullfile(folder, baseFileName);
if ~exist(fullFileName, 'file')
  % Didn't find it there.  Check the search path for it.
  fullFileName = baseFileName; % No path this time.
  if ~exist(fullFileName, 'file')
    % Still didn't find it.  Alert user.
    errorMessage = sprintf('Error: %s does not exist.', fullFileName);
    uiwait(warndlg(errorMessage));
    return;
  end
end
rgbImage = imread(fullFileName);
% Get the dimensions of the image.  numberOfColorBands should be = 3.
[rows, columns, numberOfColorBands] = size(rgbImage);
% Display the original color image.
handlesToAxes = subplot(2, 2, 1);
imshow(rgbImage);
title('Original Color Image', 'FontSize', fontSize);
subplot(2, 2, 4);
imshow(rgbImage(:,:,2));
title('Green Channel Image', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);
% Save the whole figure.
export_fig(gcf, 'Entire_figure.png');
% Save just the axes, not the whole figure.
export_fig(handlesToAxes, 'Just_the_axes.png');

Image Analyst 2013-6-15

I don't have your data so it's hard for me to reproduce.

Rhys 2013-6-15

Well it worked when I tried it outside of my program so I will just keep playing around with it. Thanks for your help, it is much appreciated!

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Saving a Figure from inside a GUI

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