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Re: Re: GridPlot

• To: mathgroup at smc.vnet.net
• Subject: [mg45842] Re: [mg45818] Re: GridPlot
• From: Selwyn Hollis <sh2.7183 at misspelled.erthlink.net>
• Date: Tue, 27 Jan 2004 04:50:34 -0500 (EST)
• References: <200401240536.AAA07423@smc.vnet.net> <bv00jr$jf1$1@smc.vnet.net> <200401260653.BAA29790@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

/; is the short form of Condition.

-----
Selwyn Hollis
http://www.math.armstrong.edu/faculty/hollis
(edit reply-to to reply)


On Jan 26, 2004, at 1:53 AM, Harold Noffke wrote:

> Selwyn:
>
> I liked your gridPlot module, and it is in my library.  However, I
> don't understand one Mathematica programming construct you used twice.
>  I've neither seen it before, nor have I been able to find a
> programmer's definition for it in the Mathematica 5.0 Help System.  In
> the line of code ...
>
>     {GrayLevel[0.], AbsoluteThickness[t_], Line[{{u_, y1_}, {u_,
> y2_}}]} /;
>
> you use the /-character before the semicolon.  There is an earlier
> line where you also use this.
>
> Other than "division", I don't know what the /-character accomplishes
> in this context.  Does it go with the semicolon (which ends lines
> without output)?  I do know that if I take it out, your code
> malfunctions.
>
> If there's an reference for this in the Help System, I'd also
> appreciate a pointer to the correct bookmark.
>
> Regards,
> Harold
>
>

• References:
  • Any way to display vars internal to a function on interrupt?
    • From: dont@agora.rdrop.com (Don Taylor)
  • Re: GridPlot
    • From: Harold.Noffke@wpafb.af.mil (Harold Noffke)