R help - Aug 2011 - 3D surface plot

I have what is probably a noob question, but....

I am trying to create a 3d plot to illustrate the range of values for the
following simple function:

A = B*(C/D) 

B, C, and D are independent variables whose range are equal (e.g. 1 to 3
inclusive)

I figure it's not possible to map the surface of A on the 3d space defined
by B, C and D but I would like to create a surface defined by the lower and
upper limits of the variables - that is to say a rectangle with corners at
(1,1,1), (2,3,2), (3,3,3) and (3,2,2) with a color map displayed on it
corresponding to the values of A and a color key to the side of that.

I have been able to wrap my head part way around persp and wireframe and can
create a surface for A~B*(C/D) in either, but have not managed to create either
the

On Aug 16, 2011, at 9:50 PM, Eric Heupel wrote:
> I have what is probably a noob question, but....
>
> I am trying to create a 3d plot to illustrate the range of values  
> for the following simple function:
>
> A = B*(C/D)
>
> B, C, and D are independent variables whose range are equal (e.g. 1  
> to 3 inclusive)
>
> I figure it's not possible to map the surface of A on the 3d space  
> defined by B, C and D but I would like to create a surface defined  
> by the lower and upper limits of the variables - that is to say a  
> rectangle with corners at (1,1,1), (2,3,2), (3,3,3) and (3,2,2) with  
> a color map displayed on it corresponding to the values of A and a  
> color key to the side of that.
>
> I have been able to wrap my head part way around persp and wireframe  
> and can create a surface for A~B*(C/D) in either, but have not  
> managed to create either the
The rgl package will allow plotting in pseudo 3D space ... once you  
unwrap your head sufficiently to provide a suitable sample dataset.  
Persp and wireframe are designed for a function of two variables:  A ~  
B*C. You could also plot slices at various levels of D with those or  
perhaps more clearly with levelplot

-- 

David Winsemius, MD
West Hartford, CT

On 11-08-16 9:50 PM, Eric Heupel wrote:
> I have what is probably a noob question, but....
>
> I am trying to create a 3d plot to illustrate the range of values for the
following simple function:
>
> A = B*(C/D)
>
> B, C, and D are independent variables whose range are equal (e.g. 1 to 3
inclusive)
>
> I figure it's not possible to map the surface of A on the 3d space
defined by B, C and D but I would like to create a surface defined by the lower
and upper limits of the variables - that is to say a rectangle with corners at
(1,1,1), (2,3,2), (3,3,3) and (3,2,2) with a color map displayed on it
corresponding to the values of A and a color key to the side of that.
>
> I have been able to wrap my head part way around persp and wireframe and
can create a surface for A~B*(C/D) in either, but have not managed to create
either the
The contour3d function in misc3d might do what you want.  See the examples.

Duncan Murdoch