R help - Nov 2012 - 3d plotting from a 2d array

Hi,

I'm new to R and am learning the ropes of r-help and programming.

I'm attempting to plot a 2-D mesh in 3-D using the persp function.  I've
positioned the graph using phi and theta, but I'm having trouble overlaying
color onto the actual surface according to the surface's "z"
values.  I've
tried the "col" feature but it doesn't put a flowing color
gradient on the
entire surface...

Additionally, the xlab and ylab labels are appearing squished on the outer
edges of the chart.  Is there any way to get rid of the arrow along the
axes and replace them with ticks and labels? "nticks" wasn't
working...

Is persp the best way to 3-D plot a 2-D array where I can overlay color??

Any guidance would be greatly appreciated.

Thanks for your consideration.

Jake

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On 12-11-11 7:08 PM, Jake Roth wrote:
> Hi,
>
> I'm new to R and am learning the ropes of r-help and programming.
>
> I'm attempting to plot a 2-D mesh in 3-D using the persp function. 
I've
> positioned the graph using phi and theta, but I'm having trouble
overlaying
> color onto the actual surface according to the surface's "z"
values.  I've
> tried the "col" feature but it doesn't put a flowing color
gradient on the
> entire surface...
>
> Additionally, the xlab and ylab labels are appearing squished on the outer
> edges of the chart.  Is there any way to get rid of the arrow along the
> axes and replace them with ticks and labels? "nticks" wasn't
working...
>
> Is persp the best way to 3-D plot a 2-D array where I can overlay color??
>
> Any guidance would be greatly appreciated.
>
An alternative is the persp3d function in the rgl package.  It handles 
colour differently from persp:  vertices get colours, rather than 
facets.  That might give you the gradient you want.

Duncan Murdoch