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Re: Dashed GridLines appear impossible

  • To: mathgroup at
  • Subject: [mg7417] Re: [mg7395] Dashed GridLines appear impossible
  • From: Fabian Haas <b5hafa at>
  • Date: Sat, 31 May 1997 15:07:27 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Luci Ellis <elisha at> wrote:

>I have been experimenting with plotting options lately. At my work, we have
>a particular house style of graph, which we create in DeltaGraph (and
>something close to it in Excel). I would like to replicate this style for
>the graphs I create in Mathematica, as this would save exporting large
>datafiles and massaging them into a form that Excel or DeltaGraph would
>Unfortunately, it appears that the graph option GridLines doesn't allow the
>line styles Dashing or AbsoluteDashing to be used with it. GrayLevel, Hue,
>Thickness are all okay, but not Dashing. Why is this?
>Can I achieve dashed gridlines without coding them in raw graphic primitives?
>I would like to write a function that applies all the departmental styles
>in one hit, so that I can use it in a more general way, without having to
>define exactly where the gridlines must be placed.
>Any ideas, or explanation of why this functionality was omitted, gratefully
>Thanks in anticipation,
>Luci Ellis:  elisha at


I am not sure if my suggestions really help, but I have the feeling that GridLines options is somewhat clumsy concerning parentheses, so I would encourage you to nest the options further, uses more parentheses nested.

Making GridLine with the Line primitive should be a problem. Your function must check for minimal and maximal values in your data set and divide that range be a arbitrary number of gridlines (v = Transpose[ data ], Min[v[[1]]], Max[v[[1]]])
The returnobject should be a list of Line primitives with yoour directives. Put the whole thing into a Graphics object.

Dipl.Biol. Fabian Haas, MPhil
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