Matlab draw 'subaxis' based subplots on specified 'axes'

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Aaronne
Aaronne 2014-3-6
Hi smart guys,
I am coding some GUI staff using Matlab. And I want to plot a figure with subfigures in one specified 'axes' using 'subaxis' method (which can be download on Matlab FX [subaxis.m][1]).
The program behaves quite right at first. As the subfigures are updating by one click button. Then the error pops-up. I simplify the problem and write some testing codes as following:
% Specify an 'axes' in my GUI (here is an example of axes handle called 'ax')
ax = axes;
axes(ax);
cla(ax, 'reset');
% Plot something using 'subaxis' with multiple subfigures
x = 0:0.1:10;
spacing = 0.0;
subaxis(3,1,1,'Spacing',spacing);
plot(x,rand(size(x)),'k')
legend('D','Location','NorthWest')
ylim([-0.2 1])
set(gca, 'box','off')
set(gca,'XAxisLocation','top')
subaxis(2,'Spacing',spacing);
plot(x,rand(size(x)),'r')
legend('C','Location','NorthWest')
ylim([-0.2 1])
set(gca,'xtick',[],'box','off','xcolor','w')
subaxis(3,'Spacing',spacing);
plot(x,rand(size(x)),'b')
legend('B','Location','NorthWest')
set(gca, 'box','off')
The program is fine at this point and did what I expected. Now I press a button to update these subfigures, but still want to plot the subfigures in the specified axes called 'ax':
axes(ax);
cla(ax, 'reset');
x = 0:0.1:10;
spacing = 0.0;
subaxis(3,1,1,'Spacing',spacing);
plot(x,rand(size(x)),'k')
legend('D','Location','NorthWest')
ylim([-0.2 1])
set(gca, 'box','off')
set(gca,'XAxisLocation','top')
subaxis(2,'Spacing',spacing);
plot(x,rand(size(x)),'r')
legend('C','Location','NorthWest')
ylim([-0.2 1])
set(gca,'xtick',[],'box','off','xcolor','w')
subaxis(3,'Spacing',spacing);
plot(x,rand(size(x)),'b')
legend('B','Location','NorthWest')
set(gca, 'box','off')
Error shows up!!!
Error using axes
Invalid object handle
Not sure what to do as the error info is so brief. It seems the subaxis can only be plot to a specific 'axes' once.
Any help would be appreciated. Thanks very much. A.
[1]: http://www.mathworks.co.uk/matlabcentral/fileexchange/3696-subaxis-subplot

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