Re: ploting piecewise function in contourplot3d section

*To*: mathgroup at smc.vnet.net*Subject*: [mg111674] Re: ploting piecewise function in contourplot3d section*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Tue, 10 Aug 2010 03:54:00 -0400 (EDT)

f[x_, y_, z_] := Piecewise[{ {x - (y + z)/2, y < (x + z)/2}, {(y + x)/2 - z, y >= (x + z)/2}}] ContourPlot3D[ f[x, y, z] == (250*10^6), {x, -10^9, 10^9}, {y, -10^9, 10^9}, {z, -10^9, 10^9}] Or scaled by 10^7 ContourPlot3D[ f[x, y, z] == 25, {x, -100, 100}, {y, -100, 100}, {z, -100, 100}] Bob Hanlon ---- kamal <azimikamal at gmail.com> wrote: ============= hi, i want plot x - .5*(y + z) = (250*10^6) when y < .5*(x + z) .5*(y + x) - z = (250*10^6) when y >= .5*(x + z) how can i do that in contourplot3d