[Rd] persp command

Robert Baer rb@er @ending from @t@u@edu
Mon Jul 16 20:47:57 CEST 2018

On 7/16/2018 7:28 AM, Christian Rau wrote:
> Dear R-devel mailing list,
> I am wondering whether the "theta" and "phi" parameters of the "persp"
> function
> in the graphics commands are named in error (the names seem to have been
> swapped).
Not that it is authoritative, but one gleans from wikipedia, 
https://en.wikipedia.org/wiki/Spherical_coordinate_system ,  that 
phyicists and mathematicians have exactly opposite conventions for the 
meaning of theta and phi .

In the end, a symbol is just a standin for what it "stands for" so, we 
just need to follow the persp convention when using persp. :-)

> Also, in the documentation to "persp", reference is made to
> "colatitude"
> when the effect in the image is actually that of "latitude".
> Thank you,
> Sincerely,
> Christian
> 	[[alternative HTML version deleted]]
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Robert W. Baer, Ph.D.
Professor of Physiology
Kirksville College of Osteopathic Medicine
A T Still University of Health Sciences
800 W. Jefferson St
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