MATLAB Answers

How can I save a figure within app designer?

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J. Webster
J. Webster on 27 Apr 2016
Edited: Adam Danz on 21 Dec 2020
I've developed an application using the new App Designer. I'd like to have users be able to click a button and save a figure to a .fig file, or some other image format.
function ButtonSaveFigureButtonPushed(app)
newfigure = figure;
copyobj(app.UIAxesAP, newfigure);
hgsave(newfigure, 'testFIgure.fig');
end
But that gave me the error...
Error using matlab.ui.control.UIAxes/copyElement (line 1219)
Functionality not supported with UIAxes. For more information, see Graphics Support in App Designer.
What's the best way to go about this?
  2 Comments
Eric Sargent
Eric Sargent on 9 Dec 2020
As of R2020b copyobj supports copying a UIAxes object.

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Accepted Answer

David
David on 4 Apr 2018
Edited: David on 4 Apr 2018
I spent some time on this for my own purposes. The trick is to save the individual values from the figure into local variables to be used in a figure as follows:
h = figure;
h.Visible = 'off';
x = UIAxes.XAxis.Parent.Children.XData;
y = UIAxes.XAxis.Parent.Children.YData;
plot(x,y)
lgndName1 = UIAxes.Legend.String{1};
lgd = legend(lgndName1);
lgd.Box = UIAxes.Legend.Box;
lgd.Location = UIAxes.Legend.Location;
h.CurrentAxes.YLabel.String = UIAxes.YLabel.String;
h.CurrentAxes.YLabel.FontSize = UIAxes.YLabel.FontSize;
h.CurrentAxes.XLabel.String = UIAxes.XLabel.String;
h.CurrentAxes.XLabel.FontSize = UIAxes.XLabel.FontSize;
h.CurrentAxes.Title.String = UIAxes.Title.String;
h.CurrentAxes.Title.FontSize = UIAxes.Title.FontSize;
h.CurrentAxes.XLim = [0 max(x)];
h.CurrentAxes.XLim = [0 max(y)+1];
saveas(h,SaveName,'jpg')
savefig(h,SaveName)
delete(h)
Notice I have the visibility off, because I don't want the user to see this going in the background.
Note: You will have to change "UIAxes" to whatever you've named your UI figure
You could also add more properties, but you will have to go into your figure and find the object name to use.
I hope this helps.
Edit: I should also mention that to get this to work as function, I had to make it a call function in a separate .m file. I made a function SaveFigures(UIAxes, SaveName) that is called when ButtonSaveFigureButtonPushed. I have multiple possible plots, which is why I allow the UIAxes to vary. (I use a switch case to make sure I save the correct plot.)
  7 Comments
Eric Sargent
Eric Sargent on 9 Dec 2020
As of R2020b copyobj supports copying a UIAxes object.

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More Answers (14)

Joost
Joost on 2 Oct 2018
Edited: Joost on 3 Oct 2018
Inspired by David's answer , I came up with this solution which I believe is more generic. My UIAxes contains a lot of graphics objects (mostly patch objects) which are all copied to a temporary figure and then saved. I took over some UIAxes properties (axes limits and data aspect ratio), but you can add any other property you need there. Specify fileName yourself. I put a button called 'Snapshot' in the app with a callback that contains the code below. Matlab R2018a was used.
% Create a temporary figure with axes.
fig = figure;
fig.Visible = 'off';
figAxes = axes(fig);
% Copy all UIAxes children, take over axes limits and aspect ratio.
allChildren = app.UIAxes.XAxis.Parent.Children;
copyobj(allChildren, figAxes)
figAxes.XLim = app.UIAxes.XLim;
figAxes.YLim = app.UIAxes.YLim;
figAxes.ZLim = app.UIAxes.ZLim;
figAxes.DataAspectRatio = app.UIAxes.DataAspectRatio;
% Save as png and fig files.
saveas(fig, fileName, 'png');
savefig(fig, fileName);
% Delete the temporary figure.
delete(fig);
  12 Comments

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Adam Danz
Adam Danz on 24 Mar 2019
Edited: Adam Danz on 21 Dec 2020
How can I save a figure within app designer?
Matlab r2016a or later
copyUIAxes(handle,parent) from the file exchange copies the content of uiaxes, and the legend and colorbar if requested, to a new figure. It's a substitute for Matlab's copyobj() which does not support uiaxes prior to r2020b.
% Example
fig = figure();
h = copyUIAxes(app.UIAxes, fig);
Alternatively, use a 3rd party app for screenshots.
Matlab r2020a or later
exportgraphics(obj,filename) stores a snapshot of a graphics object (axes or figure) to an image file (jpg,png,tiff,pdf,emf,eps,+more).
% Example
exportgraphics(app.UIFigure,'C:\Users\name\Documents\Matlab\AppImage.png')
copygraphics(obj) copies a snapshot of a graphics object (axes or figure) to the system's clipboard for each copy-paste.
Matlab r2020b or later
Options (see this Community Highlight for a review)
copyobj(handle,parent) copies a graphics handle, including uiaxes in r2020b+, to a parent.
% Example
fig = figure();
copiedAxes = copyobj(app.UIAxes, fig);
exportapp(fig,filename) exports a UIFigure to a an image file (JPEG, PNG, TIFF, or PDF).
% Example
exportapp(app.UIFigure, 'C:\Users\name\Documents\Matlab\AppImage.png')
F = getframe(ax) or F = getframe(fig) captures the axes or figure as it appears on the screen as a movie frame. getframe() has been around for a long time but its support for uifigures started in r2020b.
% Example
F = getframe(app.UIFigure);
fig = figure();
imshow(F.cdata,'Parent',fig)
This answer has been updated. The original answer is in a comment below.
  6 Comments
Adam Danz
Adam Danz on 21 Apr 2020
Thanks for the feedback, Ramu Pradip. I'll think about implementing yyaxis functionality in copyUIAxes.
In the mean time, here's a simple way to use copyUIAxes with yyaxis plots. It copies the left and right axes individually (creating two axes on top of eachother).
% Create yyaxis plot within uiaxes
fig = uifigure();
ax = uiaxes(fig);
yyaxis(ax, 'left')
plot(ax, 1:5, rand(1,5), '-')
ylabel(ax, 'left')
yyaxis(ax, 'right')
plot(ax, 1:.2:5, rand(1,21), 'o')
ylabel(ax, 'right')
xlabel(ax, 'x axis')
title(ax, 'Title')
% Copy left and right axes to the same figure
newFig = figure;
yyaxis(ax, 'left')
axLeft = copyUIAxes(ax, newFig);
yyaxis(ax, 'right')
axRight = copyUIAxes(ax, newFig);
% Make some changes to the right axes
axRight.axes.Color = 'none'; % make transparent
axRight.axes.XTick = []; % remove duplicate x-ticks
axRight.axes.XLabel = []; % remove duplicate x-label
axRight.axes.Title = []; % remove duplicate title

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Guilherme Salgado Braga
Guilherme Salgado Braga on 24 Feb 2018
According to the R2017b documentation on: https://www.mathworks.com/help/matlab/creating_guis/graphics-support-in-app-designer.html
Functions saveas and savefig are not yet supported.

Dharmendra Sharma
Dharmendra Sharma on 15 Jun 2018
Edited: Dharmendra Sharma on 15 Jun 2018
This is the one potential solution which works for me. First, plot the figure/figures in normal way without using uifigure for example see code below. Visibility is on in the following example-
figure('Name','Acc','NumberTitle','off','units','normalized','outerposition',[0 0 1 1])
Then create a separate matlab function file (and call that matlab function from matlab ui). the function may include code to extract figure properties and save the figures as png file. The following link explains the saving all the figures and the code as well-- see the link--
It just need some modifications and I included these in follwoing code-
function [] = handleFigures()
result = isfolder('figures');
if result==0
mkdir figures;
else
delete('figures/*.*')
end
FolderName = 'figures'; % Your destination folder
FigList = findobj(allchild(0), 'flat', 'Type', 'figure');
for iFig = 1:length(FigList)-1
FigHandle = FigList(iFig);
FigName = get(FigHandle, 'Name');
saveas(FigHandle, fullfile(FolderName, [FigName, '.png']))
end
disp('closing figures');
close all
end

Chao Gong
Chao Gong on 19 Jun 2019
Hello David:
I am using the same method answer by you David on 4 Apr 2018. However, I tried to open the saved .fig files afterwards using Matlab, but it doesn't open or respond. The .png files are saved nicely.
Do you encounter similar problem? Is there any possible reason why the saved .fig can't be open?
Thanks

Chao Gong
Chao Gong on 19 Jun 2019
Hi,
Found the issue of this problem. it's because the 'Visible' property is set 'off'. A workaroudn is as below.
--------
This is not currently possible in MATLAB.
As a workaround, please specify 'visible' option when calling 'openfig' to open the figure after it has been saved.
You can also set the "CreateFcn" property of the figure to a function which sets the "Visible" property to on. This allows you to save the figure when invisible but always make it visible when opening it later.
hFig = figure('Visible', 'off');
plot(1:10)
% Set CreateFcn callback
set(hFig, 'CreateFcn', 'set(gcbo,''Visible'',''on'')');
% Save Fig file
savefig(hFig, 'savedFigure.fig')

J. Webster
J. Webster on 28 Apr 2016
anybody??
  1 Comment
Tausif
Tausif on 10 Mar 2017
did u get a solution yet? I was looking to do the same

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Tobias Daßler
Tobias Daßler on 20 Dec 2017
I used a workaround:
saveas(gca,uiputfile({'*.png'; '*.fig'; '*.jpg'}));
close Plot;
Maybe you could adapt this for your problem.
  2 Comments
Adam Danz
Adam Danz on 24 Mar 2019
Functionality not supported with figures created with the uifigure function. So, this doesn't work with axes created in app designer.

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Craig Pearson
Craig Pearson on 8 Jan 2018
I'm having a similar problem and would like a solution. I was trying to use the print function to copy a figure to the clipboard.
Annoyingly, if I use debugging mode, once the figure is created I can quit debugging mode then use
print -dmeta
from the command window and it proceeds fine - I can then paste this into Excel from the command line (which is what I'm aiming to do from within the app).
Why can this not be achieved from within the App?

Blanca Larraga
Blanca Larraga on 4 Jun 2018
Is there a solution for saving the axes plot in a .jpeg format or not yet? I am trying to insert what I got un an axes figure within a report automatically in app designer but I don't manage to do so. Thanks.

Jyothi Karri
Jyothi Karri on 20 Jul 2018
I have the same issue. Cannot export a UIAxes from gui created from app designer. copyobj did not work either.
  1 Comment
Udo Schröder
Udo Schröder on 13 Aug 2018
I have the same issue. It would help if there would be a nice option just to map an UIAxes element into a normal (pop-up) figure. Then the figure could be saved with the common tools.

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Paramjeet Panwar
Paramjeet Panwar on 15 Oct 2018
My current workaround is identifying the pixel position of the UIFigure and UIAxes on the screen and taking a snapshot using Java libraries.
Refer to these links -
2 Using Java library for screenshot - this link

Eric Sargent
Eric Sargent on 9 Dec 2020
As of R2020b copyobj supports copying a UIAxes object.

Thamer Al-Zuriqat
Thamer Al-Zuriqat on 20 Dec 2020
Improved answer inspired by David and Joost , which is technically a combination of both solutions.
fig = figure;
fig.Visible = 'off';
figAxes = axes(fig);
% Copy all UIAxes children, take over axes limits and aspect ratio.
allChildren = app.UIAxes.XAxis.Parent.Children;
copyobj(allChildren, figAxes)
figAxes.XLim = app.UIAxes.XLim;
figAxes.YLim = app.UIAxes.YLim;
figAxes.ZLim = app.UIAxes.ZLim;
figAxes.DataAspectRatio = app.UIAxes.DataAspectRatio;
lgndName1 = app.UIAxes.Legend.String{1};
lgd = legend(lgndName1);
lgd.Box = app.UIAxes.Legend.Box;
lgd.Location = app.UIAxes.Legend.Location;
fig.CurrentAxes.YLabel.String = app.UIAxes.YLabel.String;
fig.CurrentAxes.YLabel.FontSize = app.UIAxes.YLabel.FontSize;
fig.CurrentAxes.XLabel.String = app.UIAxes.XLabel.String;
fig.CurrentAxes.XLabel.FontSize = app.UIAxes.XLabel.FontSize;
fig.CurrentAxes.Title.String = app.UIAxes.Title.String;
fig.CurrentAxes.Title.FontSize = app.UIAxes.Title.FontSize;
% Save as png and fig files.
saveas(fig, fileName, 'png');
savefig(fig, fileName);
% Delete the temporary figure.
delete(fig);

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