For loop is taking a lot of time to execute.
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I have to change four diagrams during the execution of one for loop. I'm using subplot to plot all the diagrams in one. But the loop takes too long for execution. I think it is because of the function "figure" being called every time. But if I'm not including figure after every loop execution it isn't showing the plot. All the variables in the code are matrices(eg. barax(i,;)). pos is the handle for the figure.
pos = figure('units','normalized','position',[0 0 1 1],'color','b',...
'menubar','none','numbertitle','off','name','WW_QuickReturn');
for i = 1:div
if strcmp(get(pb,'string'),'Start')
return
end
figure(pos)
%%Stimulation
subplot(2,2,1)
set(subplot(2,2,1),'XTickLabel',[],'YTickLabel',[],'XLim',[xmin xmax],'YLim',[ymin ymax],'XTick',0,'YTick',0)
hold on
title ('Stimulation','fontweight','bold','fontsize',20,'color','w')
cla;
plot(barax(i,:),baray(i,:),'b',barbx(i,:),barby(i,:),'g',barcx(i,:),barcy(i,:),'c','linewidth',5);
plot(0,0,'ok')
plot(0,0,'sk','MarkerSize',12)
plot(0,-1*d,'ok')
plot(0,-1*d,'sk','MarkerSize',12)
plot([min(x4)-20,max(x4)+20],[y4-10.5,y4-10.5],'k','linewidth',7)
fill(xset1(i,:),yset1(i,:),'r');
fill(xset(i,:),yset(i,:),'r');
hold off
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%Velocity Diagram
subplot(2,2,2)
title ('Velocity Vector','fontweight','bold','fontsize',20,'color','w')
hold on
cla;
set(subplot(2,2,2),'XTickLabel',[],'YTickLabel',[],'XLim',[min(Vc) max(Vc)],'YLim',[1.5*min(Va*sin(t)) 1.5*max(Va*sin(t))],'XTick',0,'YTick',0)
quiver(0,0,Va*sin(-t(i)),Va*cos(-t(i)),0)
h1 = text(Va*sin(-t(i))/2,Va*cos(-t(i))/2,'Va');
set(h1,'Rotation',-t(i)*180/pi);
quiver(Va*sin(-t(i)),Va*cos(-t(i)),-Vc(i)-Va*sin(-t(i)),-Va*cos(-t(i)),0)
h2 = text((-Vc(i)+Va*sin(-t(i)))/2,(Va*cos(-t(i))/2),'Vca');
set(h2,'Rotation',atan(-Va*cos(-t(i))/2/(Vc(i)-Va*sin(-t(i))/2)));
quiver(0,0,-Vc(i),0,0)
text(-Vc(i)/2,0,'Vc');
hold off
end
Can anyone suggest how to reduce the execution time.
6 个评论
Geoff Hayes
2017-11-14
ok, so try updating the plot on each iteration of the loop. here is a quick example
x = -2*pi:0.01:2*pi;
y = sin(x);
figure;
hPlot = plot(NaN,NaN);
xlim([x(1) x(end)]);
ylim([min(y) max(y)]);
for k=1:length(x)
xdata = [get(hPlot,'XData') x(k)];
ydata = [get(hPlot,'YData') y(k)];
set(hPlot,'XData',xdata,'YData',ydata);
pause(0.01);
end
Note how we call plot once and then update the x and y data for that plot on each iteration of the loop.
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