Re: [Matplotlib-users] matplotlib priorities

[Gary R. <ga...@em...>]

John,
Once again you've amazed me with your responsiveness to feature ideas.
Thanks! Hopefully I'll get sick of my more pressing work soon and have a look at implememnting some other markers,
Gary

----- Original Message -----
From: John Hunter <jdh...@ac...>
Date: Tue, 04 May 2004 09:03:22 -0500
To: "Gary Ruben" <ga...@em...>
Subject: Re: [Matplotlib-users] matplotlib priorities

> >>>>> "Gary" == Gary Ruben <ga...@em...> writes:
> 
>     Gary> Hi John, I think it would be nice to have a few more line
>     Gary> and marker types.  For example, DISLIN has 24 marker symbol
>     Gary> types and 8 line types.  Perhaps one could specify (perhaps
>     Gary> in points) the length of the dashes and the spacing between
>     Gary> them for dashed line types and perhaps even specify the
>     Gary> pattern of dashes, dots and spaces, but maybe I'm a line
>     Gary> type control-freak. 
> 
> Rightfully so.  Ideally everything should be under your control.  BTW,
> new symbols are fairly easy to add.  Just take a look at lines.py.
> Basically, you just have to define one new function following the lead
> of the many that are already there and one new dictionary entry in
> lineMarkers.  If you or anyone else defines some custom markers,
> please send them my way.
> 
>     Gary> Actually, what I'd really like is for the ratio of dashes to
>     Gary> the breaks between them to be changed. A 3 or 4 to 1 ratio
>     Gary> looks nicer than what I'm seeing with GTKAgg (about 1 to 1),
>     Gary> but others' opinions may vary, hence the control-freak
>     Gary> suggestion.  Gary
> 
> Actually this is how dashes are implemented at the renderer level,
> with an arbitrary sequence of on off ink in points.  All that was
> needed was to expose this to the user interface, which I've done with
> a new method set_dashes, eg, 
> 
> line.set_dashes([5,3,1,12])  # 5 on 3 off 1 on 12 off
> 
> In the next release there will be a new examples/dash_control.py which
> illustrates this.
> 
> Thanks for the suggestion,
> John

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