Re: Re: ImplicitPlot errors
- To: mathgroup at smc.vnet.net
- Subject: [mg75123] Re: [mg75088] Re: ImplicitPlot errors
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Wed, 18 Apr 2007 04:55:43 -0400 (EDT)
- References: <200704170016.UAA08688@smc.vnet.net>
On 17 Apr 2007, at 09:16, Bill Rowe wrote: > On 4/16/07 at 4:11 AM, w3bdevilREMOVE at THISw3bdevil.com (David Rees) > wrote: > >> I've been trying to get ImplicitPlot to plot an implicit function >> (naturally ;) ), but it throws errors to cryptic for me, even when >> copying and pasting from the Mathematica function reference. > >> In[40]:= ImplicitPlot[{x^2 + x*y + y^2 == 7, y == 2*Sqrt[7/3]}, {x, >> -5, 5}] > > Given: > > In[14]:= > Reduce[{x^2+x*y+y^2\[Equal]7,y\[Equal]2*Sqrt[7/3]}] > > Out[14]= > y == 2*Sqrt[7/3] && x == -Sqrt[7/3] > > that is your equations reduce to a single point, it should not > be surprising ImplicitPlot complains > Actually ImplicitPlot[{x^2 + x*y + y^2 == 7, y == 2*Sqrt[7/3]}, {x, -5, 5}] works fine and displays a straight line and an ellipse, exactly as it should. Andrzej Kozlowski
- References:
- Re: ImplicitPlot errors
- From: Bill Rowe <readnewsciv@sbcglobal.net>
- Re: ImplicitPlot errors