Re: a simple question about contour3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg81059] Re: a simple question about contour3D*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Sun, 9 Sep 2007 06:20:38 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <fbtk98$86d$1@smc.vnet.net>

ex902 wrote: > this is my first question, I am so new in mathematica... > So here is the question: > say, I have three variables... > > CRF=0.131474 > h=5110 > and > PEC=1000000 > > and the equation is: > CA=CRF*PEC/h > > I want to plot CA according to the changes in 'h' and 'PEC'... how can I do this ? You can write directly the expression in the plotting commands themselves. Use *Plot* for 2D graphs (lines) and Plot3D for 3d graphs (surfaces). Here is an example, CRF = 0.131474; PEC = 1000000; Plot[CRF*PEC/h, {h, 4000, 6000}] Plot3D[CRF*PEC/h, {h, 4000, 6000}, {PEC, 500000, 1500000}] -- Jean-Marc