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."