Re: Behavior of scatter.m

[Robert T. Short]

Ok.  A little more noise.  I get lots of

setting font to {},10

messages when plotting using 3.4.

Robert T. Short wrote:
> This is for general information.  This topic has been discussed 
> before, apparently with no real resolution.
>
> Attached are three loglog plots.  The x axis is the number of points 
> in the scatter plot and the y axis is the time it took to create the 
> scatter plot.
>
> The file badnews.pdf is done using octave on a core i7/860 with 32 bit 
> linux and 4G of RAM.
>
> The file goodnews.pdf is done using MATLAB on a core i5/750 with 
> Windows XP and 4G of RAM.
>
> The file bestnews.pdf is done using octave on the i7 machine above, 
> but I used 'plot(x, y, '.')' instead of scatter.
>
> Since the windows and linux machines are pretty different and 
> octave/MATLAB do things differently, it is hard to make reasonable 
> judgments about the absolute numbers, but it is clear that octave 
> scatter performs very badly, and is in fact useless for much over 100 
> points.  In every case I get out of memory errors above 1^6 points.  
> That, at least to me, is not a problem, but I routinely do scatter 
> plots with 10,000 to 100,000 points.
>
> I am looking at octave scatter trying to figure out where things go 
> south so badly, but I am just don't know enough about the plotting 
> stuff to make much headway.
>
> Bob