Re: 3D plot - resend

*To*: mathgroup at smc.vnet.net*Subject*: [mg36398] Re: 3D plot - resend*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Wed, 4 Sep 2002 21:22:10 -0400 (EDT)*Organization*: Universitaet Leipzig*References*: <al4b65$rgt$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de*Sender*: owner-wri-mathgroup at wolfram.com

Hi, you mean: In[]:=Needs["Calculus`Integration`"] Integrate[Boole[x^2 + 4 - z > 0 && 4 - x^2 - y > 0 && 3 - x - y < 0 && z > 0], {x, -1, 2}, {y, 1, 5}, {z, -1, 10}]] Out[]=(15*Sqrt[5])/4 and to plot the volume: In[]:=Get["MathGL3d`OpenGLViewer`"] In[]:=MVContourPlot3D[ If[1 == Boole[x^2 + 4 - z > 0 && 4 - x^2 - y > 0 && 3 - x - y < 0 && z > 0], 1., -1.], {x, -1, 2}, {y, 1, 5}, {z, -0.1, 7}, Contours -> {0.}, PlotPoints -> 64, MVNewScene -> True] Regards Jens Shz Shz Oon wrote: > > First of all, I would like to thanks to all for trying to help. > Sorry, I must have something missing in my previous description. > > I need to find out the volumn of a 3D object which form by the equation : > z=x^2 +4 (as bottom surface) > and on the xy plane which bounded by a parabola y=4-x^2 and y=3x line. > > How would I use Mathematica to plot out this 3D object or find out its volumn > with only the equation given? > > Thank you once again! > Shz Shz > > ================================================================================== > E-mail and Data Confidentiality Notice > > This email and any of its' content is transmitted for the sole use and access > of the individual or entity to which they are addressed. Any disclosure, copying, > distribution and diversion contrary to the applicable export control laws and > regulations including US Export Administration Regulations is strictly prohibited. > > If you have received this email in error, please do not read, copy or use it, > and do not disclose it to others. Please notify the "postmaster at hitachi.com.my" > of the delivery error by replying to this message and then delete it from your > system. Thank you. > ==================================================================================