Re: How can I make the vertical axes grow down and not up?
- To: mathgroup@smc.vnet.net
- Subject: [mg11729] Re: How can I make the vertical axes grow down and not up?
- From: jtischer@pitagoras.univalle.edu.co
- Date: Thu, 26 Mar 1998 03:08:57 -0500
- Organization: Deja News - The Leader in Internet Discussion
- References: <6f1sac$fll@smc.vnet.net>
In article <6f1sac$fll@smc.vnet.net>,
Fernando Marcos Santana Barreto <barreto@fec.unicamp.br> wrote:
>
> I have a problem:
>
> I need plot a grafhic in 3D but in my reference system the Z axes grow
> down ,
> not up and I don't know hom can I do for Inverse the judgement of the z
> axes, how is this figure aloud?
>
> ---------->
> |
> |
> |
> |
> \ /
> .
>
> Thank You
>
> Fernando
>
>
Hola Fernando,
how about this?:
Plot3D[-3 Sin[x y^2], {x, -1, 1}, {y, -2, 2},
Ticks -> {Automatic, Automatic,
Table[{ti, -ti}, {ti, Floor[#2], Floor[#1], -2}]&},
ViewPoint -> {1.300, -2.400, -2.000}]
I put the minus so my function is "growing downwards", changed the
Viewpoint (just -2.000 instead of the default 2.000 for the z
coordenate) so one looks from below, and finally used a homemade "tick
mark function" (see Mathematica Book p. 494) to invert the sign of the
z-axis.
Jurgen
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