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Re: Working with large data sets
Posted:
Feb 24, 2013 1:56 PM
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On Monday, February 25, 2013 5:46:05 AM UTC+13, Jonathon Slightam wrote:
> "David Doria" <daviddoria@gmail.com> wrote in message <g96c8d$c9m$1@fred.mathworks.com>...
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> >
>
> > > Hi
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> > > The speed is also related to how many handles you are
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> > using. So the question is how do you plot the points?
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> > > Are you using plot3d or line which show the uniformed
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> > points (only one handle). Or you plot them one by one (20000
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> > handles) with differnet state?
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> > > Regards.
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> >
>
> >
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> > Ah great! I was plotting them individually, when I switched
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> > to plotting the whole matrix at the same time it worked MUCH
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> > better.
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> >
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> > ie.
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> >
>
> > for i = 1:size(V,1)
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> > plot3(h, V(i,1), V(i,2), V(i,3), 'o');
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> > end
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> >
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> > VS
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> >
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> > plot3(h, V(:,1), V(:,2), V(:,3), 'o');
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> >
>
> > Thanks!
>
>
>
> I've got a similar problem. Although, plotting as a single handle doesn't help. the Matrix I'm trying to plot in 3D is ~1,000,000 x 3 or larger. Any ideas?
Show us the code you are using for plotting.
Look at this:
xyz=randn(1000000,3);
tic;plot3(xyz(:,1),xyz(:,2),xyz(:,3),'b.');toc
Elapsed time is 0.189415 seconds.
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