Re: Re: Needed Grid lines in Implicit Plot

*To*: mathgroup at smc.vnet.net*Subject*: [mg52735] Re: [mg52699] Re: Needed Grid lines in Implicit Plot*From*: Andrzej Kozlowski <akoz at mimuw.edu.pl>*Date*: Sat, 11 Dec 2004 05:21:48 -0500 (EST)*References*: <200412070909.EAA09155@smc.vnet.net><cp42b1$ap1$1@smc.vnet.net> <200412100123.UAA18934@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

On 10 Dec 2004, at 10:23, Narasimham wrote: > Thanking you together. > But why is it necessary to combine graphics with Show, > why does not GridLines -> {Range[-4, 4, 1], Range[-4, 4, 1]} > work directly as one of the plot options? Regards > > Because ImplicitPlot returns a ContourGraphics object and Options[ContourGraphics] {AspectRatio -> 1, Axes -> False, AxesLabel -> None, AxesOrigin -> Automatic, AxesStyle -> Automatic, Background -> Automatic, ColorFunction -> Automatic, ColorFunctionScaling -> True, ColorOutput -> Automatic, ContourLines -> True, Contours -> 10, ContourShading -> True, ContourSmoothing -> True, ContourStyle -> Automatic, DefaultColor -> Automatic, DefaultFont :> $DefaultFont, DisplayFunction :> $DisplayFunction, Epilog -> {}, FormatType :> $FormatType, Frame -> True, FrameLabel -> None, FrameStyle -> Automatic, FrameTicks -> Automatic, ImageSize -> Automatic, MeshRange -> Automatic, PlotLabel -> None, PlotRange -> Automatic, PlotRegion -> Automatic, Prolog -> {}, RotateLabel -> True, TextStyle :> $TextStyle, Ticks -> Automatic} does not contain GridLines. Why not? Well presumably because this would interfere with the main purpose of ContourGraphics and make pictures less clear. In any case, you can always convert a ContourGraphics object to a graphics object and use the options of Graphics. Andrzej Kozlowski Chiba, Japan http://www.akikoz.net/~andrzej/ http://www.mimuw.edu.pl/~akoz/

**References**:**Needed Grid lines in Implicit Plot***From:*"Narasimham" <mathma18@hotmail.com>

**Re: Needed Grid lines in Implicit Plot***From:*"Narasimham" <mathma18@hotmail.com>