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waitbar + surf functions. are they incompatible?

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PN
PN 2011-6-21
[EDIT: 20110621 14:54 CDT - reformat - WDR]
When trying to establish a waitbar for a double-cycle I am using, I have found out that it is not possible to run it simultaneously with the surf function.
Example:
aux = 0;
steps = length(stelement)*length(csplate);
progressbar = waitbar(0,'graphic under construction...');
for el = 1:length(stelement)
for pl = 1:length(csplate)
aux = aux + 1;
waitbar(aux/steps);
[xplot,yplot,zplot,plotSxx] = stressplot(pl,el);
surf(xplot,yplot,zplot,plotSxx);
hold on;
end
end
close(progressbar)
Question is whether it is possible to overcome this problem in any other way.
Thanks,
PN

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采纳的回答

Walter Roberson
Walter Roberson 2011-6-21
Please describe what you see (we don't have your data or your function.)
I have used waitbar in connection with surf without difficulty.
Have you tried
waitbar(aux/steps, progressbar);
to be sure of updating the correct bar?
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PN
PN 2011-7-12
Ok this makes some sense... I have been able to overcome the problem provided that before I use the surf functions, the correct axes are recalled.
So my question then becomes: suppose that said axis are incluided in a gui, and I use the following instruction when I push a random button:
axes(handles.structplot1);
cla(handles.structplot1,'reset');
and then:
for el = 1:length(stelement)
for pl = 1:length(csplate)
step = step + 1;
waitbar(step/steps,progressbar);
[xplot,yplot,zplot,plotSxx] = Oplot(readmodes,pl,el,'Sxx');
axes(handles.structplot1);
surf(xplot,yplot,zplot,plotSxx);
hold(structplot1,'on')
end
end
This is obviously not yet what I want. What exactly do I need to do in order to obtain the axesHandle and how do I use it with surf and hold on instructions? I am obviously missing something here...
PN
PN 2011-7-12
h = gca; i suppose. Anyway, thanks for the insight! My problem is solved.

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更多回答（2 个）

PN
PN 2011-6-21
by the way, in the previous code, the matlab returns the following error:
Error using ==> uiwaitbar at 101
Couldn't find waitbar handles.
PN
Matt Fig
Matt Fig 2011-6-21
From the help for WAITBAR (always a good place to look with any funciton!), we have this:
h = waitbar(0,'Please wait...'); % Create a waitbar.
then later:
for i=1:1000,
% computation here %
waitbar(i/1000,h) % Update the existing waitbar.
end
So you see, your update to the waitbar expects the handle returned from when you first invoked it - before the loop...

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