matplotlib-users

[Matplotlib-users] show density in scatter

[Neal B. <ndb...@gm...>]

Using scatter, it seems less probably (numerous) points show just as much as 
more probable points.  Can anyone suggest a good way to emphasize the more 
probable points?

I was thinking maybe the easy way is just scale down the markers.  Drawback may 
be too many points plotted.

Colors would be nice, but I guess that would be more work?

Re: [Matplotlib-users] show density in scatter

[Eric F. <ef...@ha...>]

On 05/18/2011 09:01 AM, Neal Becker wrote:
> Using scatter, it seems less probably (numerous) points show just as much as
> more probable points.  Can anyone suggest a good way to emphasize the more
> probable points?

This is what hexbin is for, although it takes the additional step of 
showing points on a grid, not at their original precise locations.

Eric

>
> I was thinking maybe the easy way is just scale down the markers.  Drawback may
> be too many points plotted.
>
> Colors would be nice, but I guess that would be more work?
>
>
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Re: [Matplotlib-users] show density in scatter

[Neal B. <ndb...@gm...>]

Eric Firing wrote:

> On 05/18/2011 09:01 AM, Neal Becker wrote:
>> Using scatter, it seems less probably (numerous) points show just as much as
>> more probable points.  Can anyone suggest a good way to emphasize the more
>> probable points?
> 
> This is what hexbin is for, although it takes the additional step of
> showing points on a grid, not at their original precise locations.
> 
> Eric
> 

Very nice!  Thanks!

Re: [Matplotlib-users] show density in scatter

[Justin M. <jn...@gm...>]

On Wed, May 18, 2011 at 3:01 PM, Neal Becker <ndb...@gm...> wrote:

> Using scatter, it seems less probably (numerous) points show just as much
> as
> more probable points.  Can anyone suggest a good way to emphasize the more
> probable points?
>
> I was thinking maybe the easy way is just scale down the markers.  Drawback
> may
> be too many points plotted.
>
> Colors would be nice, but I guess that would be more work?
>
>
You could try something like the scatter+histograms shown here:

http://matplotlib.sourceforge.net/examples/pylab_examples/scatter_hist.html

Takes a bit more space, but the colors aren't as important.

Re: [Matplotlib-users] show density in scatter

[Eric F. <ef...@ha...>]

On 05/18/2011 09:01 AM, Neal Becker wrote:
> Using scatter, it seems less probably (numerous) points show just as much as
> more probable points.  Can anyone suggest a good way to emphasize the more
> probable points?

Another idea: set alpha to something less than 1, maybe something like 
0.3; then superimposed markers will show up darker than lone markers.

Eric

>
> I was thinking maybe the easy way is just scale down the markers.  Drawback may
> be too many points plotted.
>
> Colors would be nice, but I guess that would be more work?
>
>
> ------------------------------------------------------------------------------
> What Every C/C++ and Fortran developer Should Know!
> Read this article and learn how Intel has extended the reach of its
> next-generation tools to help Windows* and Linux* C/C++ and Fortran
> developers boost performance applications - including clusters.
> http://p.sf.net/sfu/intel-dev2devmay
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users