Re: About ContourPlot

*To*: mathgroup at smc.vnet.net*Subject*: [mg84265] Re: About ContourPlot*From*: mark <markmgg at googlemail.com>*Date*: Mon, 17 Dec 2007 01:45:27 -0500 (EST)*References*: <fk2vim$ng9$1@smc.vnet.net>

On Dec 16, 2:44 pm, water <waterloo2... at gmail.com> wrote: > grapheq = > ContourPlot[ > l + x + 2 x^2 + 2 y - 2 x y + y^2, {x, -6, 1}, {y, -6, 1}, > Contours -> {0}, > ContourShading -> False, PlotPoints -> 50, Frame -> False, > Axes -> Automatic, AxesOrigin -> {0, 0}] The problem here is that the first element in the function is l (the letter not number 1). If that was the letter you will have to give it a value, otherwise just retype it as number 1. [This is the first post with the same comments as others, do I am posting it - Moderator]