Re: graphing inequalities
- To: mathgroup at smc.vnet.net
- Subject: [mg15834] Re: [mg15820] graphing inequalities
- From: Andrzej Kozlowski <andrzej at tuins.ac.jp>
- Date: Fri, 12 Feb 1999 18:39:54 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
On Mon, Feb 8, 1999, Daniel Rubin <rubindlNOSPAM at aol.com> wrote: >How do I plat an inequality, such as y - x > 6 in Mathematica? I'd like >to end up with a dashed line and the region above the line shaded. >Thanks, >Daniel > >-- >(please remove "NOSPAM" from my email address to reply to me directly.) Mathematica comes with two packages for solving algebraic inequalities (InequalitySolve and AlgebraicInequalities but none of them have ready functions to plot the sort of graphs you want. It is not too difficult to program a simple package of this kind but there is amuch better way. The book "Exploring Mathematics with Mathematica", by Theodore W. Gray and Gerry Glynn contains an elegant package by Theodore Gray which does just that. I think it should be available somewhere on the Internet though it does not seem to be on MathSource? If you can't find it I can sent it to you (I hope I wouldn't be breaking aby copyright by doing so, but it seems to me that such Mathematica packages can be considered as freeware??) Andrzej Kozlowski Toyama International University JAPAN http://sigma.tuins.ac.jp/ http://eri2.tuins.ac.jp/