Re: GridLines and ImplicitPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg56641] Re: [mg56620] GridLines and ImplicitPlot
- From: "David Park" <djmp at earthlink.net>
- Date: Sun, 1 May 2005 00:46:41 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Steven,
Well, that is an interesting question! It appears that you have uncovered a
bug in that ContourGraphics does not include GridLines as an Option.
Needs["Graphics`ImplicitPlot`"]
The following works...
ImplicitPlot[y == x^2, {x, -1, 1},
Frame -> True,
GridLines -> Automatic]
-Graphics-
The following does not work...
plot1 =
ImplicitPlot[y == x^2, {x, -1, 1}, {y, 0, 1},
Frame -> True,
GridLines -> Automatic]
-ContourGraphics-
Notice that the two iterator form of ImplicitPlot gives ContourGraphics
while the one iterator form gives Graphics.
If we try to sneak GridLines in with a Show statement we obtain...
Show[plot1, GridLines -> Automatic]
ContourGraphics::optx: Unknown option GridLines in -ContourGraphics-
And, indeed, GridLines is not an option in ContourGraphics.
Options[ContourGraphics] // TableForm
(GridLines missing)
The unintuitive way to get the GridLines is to convert to Graphics.
Show[Graphics[plot1], GridLines -> Automatic]
On the otherhand, with the DrawGraphics package from my web site the output
is automatically converted to Graphics so there is no suprise.
Needs["DrawGraphics`DrawingMaster`"]
Draw2D[
{ImplicitDraw[y == x^2, {x, -1, 1}, {y, 0, 1}]},
Frame -> True,
GridLines -> Automatic]
David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/
From: Steven Jonak [mailto:JonakSt at gw.kirkwood.k12.mo.us]
To: mathgroup at smc.vnet.net
I can't seem to be able to use the GridLines->Automatic command with
ImplicitPlot. The help browser says that ImplicitPlot accepts all the
usual Plot options. Any ideas?
S Jonak
"Maintain an even strain."