How to use savefig in app-designer?

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Leon 2020-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/504430-how-to-use-savefig-in-app-designer

评论： Leon 2020-2-9

Here is how I plot my map in app-designer:

            load map_use; %M N
            [m n] = size(M);
            for i=1:200;
                M2 = [];
                for j=1:m;
                    if M(j,3)==i;
                        M2=[M2;M(j,1:2)];
                    end
                end
                patch(app.mapPlot, M2(:,1), M2(:,2), [0.62,0.83,0.50]);
            end;
            
            savefig(app.mapPlot, 'AA.fig'); %Line 43
      

but get this error:

Error using savefig (line 43)
H must be an array of handles to valid figures

So how do I properly use savefig and openfig within app-designer?

Many thanks!

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采纳的回答

Cameron B 2020-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/504430-how-to-use-savefig-in-app-designer#answer_414555

编辑：Walter Roberson 2020-2-9

I’d use the function created by Adam Danz found on https://www.mathworks.com/matlabcentral/answers/281318-how-can-i-save-a-figure-within-app-designer It worked well for me. You can use this and then use the saveas function to save your new figure. I suppose you can set the visibility of your new figure to ‘off’ if need be, but you’ll probably have to do that yourself.

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Leon 2020-2-9

Many thanks!

I'm reading the documentation of CopyUIAxes, but still can't quite figure it out. So, 'h = copyUIAxes(uiax)' stores the current figure to h or it actually is the command to copy the figure to another axes? I need a way to save the the entire figure info into a file so that I can load it back and redraw the figure quickly again. The new figure should allow me to reset things like the xlim, ylim, and draw more points to it, etc.

fh = uifigure();
%     uiax = uiaxes(fh);
%     hold(uiax,'on')
%     grid(uiax,'on')
%     x = linspace(0,3*pi,200);
%     y = cos(x) + rand(1,200);
%     ph = scatter(uiax,x,y,25,linspace(1,10,200),'filled');
%     lh = plot(uiax, x, smooth(x,y), 'k-'); 
%     title(uiax,'copyUIaxes Demo','FontSize',18)
%     xlabel(uiax,'x axis')
%     ylabel(uiax,'y axis')
%     zlabel(uiax,'z axis')
%     cb = colorbar(uiax); 
%     cb.Ticks = -2:2:12;
%     caxis(uiax,[-2,12])
%     ylabel(cb,'cb ylabel')
%     lh = legend(uiax,[ph,lh],{'Raw','lowess'},'Location','NorthEast'); 
%     drawnow()% all graphics to catch up before copying
% 
%     % Ex 1: Copy axis to another figure
%     h = copyUIAxes(uiax);
%     
%     % Ex 2: specify ax axis as destination
%     fNew = figure();
%     axh = subplot(2,2,1,'Parent',fNew);
%     h = copyUIAxes(uiax,axh);