[R] 3-D response surface using wireframe()

array chip arrayprofile at yahoo.com
Thu Apr 8 17:56:12 CEST 2010


This is a good explanation and a good practice.

Thank you,


--- On Thu, 4/8/10, Waichler, Scott R <Scott.Waichler at pnl.gov> wrote:

> From: Waichler, Scott R <Scott.Waichler at pnl.gov>
> Subject: Re: 3-D response surface using wireframe()
> To: "arrayprofile at yahoo.com" <arrayprofile at yahoo.com>
> Cc: "r-help at r-project.org" <r-help at r-project.org>
> Date: Thursday, April 8, 2010, 9:51 AM
> Regarding the screen argument in
> wireframe(), here is what I understand about how it works
> after much trial-and-error:
> After each rotation, new axes are in effect defined for the
> next rotation as at the start:  x is to the right of
> the 2D view, y is towards the top, and z is positive out of
> the page towards you.  Understanding this "reset" of
> coordinate system after each rotation is key to
> understanding how the sequence of rotations will be
> done.  Rotations follow the right-hand rule: 
> positive angles follow curved fingers of right hand, with
> thumb pointing in positive direction of associated axis.
> I labeled a wooden block with axes and turned it in my hand
> to help me make the initial guess at the sequence of
> rotations I would want for a given view.  
> Scott Waichler
> Pacific Northwest National Laboratory
> P.O. Box 999, Richland, WA  99352
> scott.waichler at pnl.gov
> 509-372-4423, 509-341-4051 (cell)

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