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From: Ben <jbenjam@gmail.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: 3-D polar plotting with discrete data points?
Date: Tue, 22 Jul 2008 19:24:08 -0700 (PDT)
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I replied too quickly -- In this case, because there are 3 angles,
each angle can be thought of as a respective rotation about the x, y,
and z axis.   This means that the three angles can be transformed into
two (somehow).  When combined with a length, as you said, two angles
are sufficient to describe all positions in 3-D cartesian space.

I just need to recall how to do that 3 angle to 2 angle
transform.  :-)   I think you've put me on the right path, I'll mess
around with it for awhile.

Thanks,
-Ben


On Jul 22, 10:18=A0pm, Ben <jben...@gmail.com> wrote:
> On Jul 22, 5:12=A0pm, rober...@ibd.nrc-cnrc.gc.ca (Walter Roberson)
> wrote:
> <snip>
>
> > I'm not sure how you are going to convert to cartesian coordinates,
> > though, as a 3D cartesian coordinate would normally be two angles
> > and a distance; having three angles sounds like a 4D surface.
>
> Thanks! =A0You've triggered my memory: =A0 This is a spherical coordinate=
s
> to cartesian coordinates transformation, and meshgrid should
> regularize the data points appropriately.
>
> I'll follow the coordinate transformation rules outlined at:http://en.wik=
ipedia.org/wiki/Spherical_coordinate_system
>
> Cheers,
>
> -Ben