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Re: Re: Plot Angle between Vectors

  • To: mathgroup at
  • Subject: [mg62151] Re: [mg62094] Re: [mg62060] Plot Angle between Vectors
  • From: "G. Raymond Brown" <gbrown at>
  • Date: Sat, 12 Nov 2005 03:33:09 -0500 (EST)
  • References: <> <> <>
  • Sender: owner-wri-mathgroup at


Thanks.  I was unaware of this change.  Not that I find any fault with
David regarding it.  He has made an excellent contribution, and it is
reasonable to me that he no longer make it freely available.  I would be
willing to pay $50 for the drawing packages, had I not already them in my
possession (and, no, I _don't_  have money to burn!).  On the other hand,
I would prefer that it be sold through WRI rather than a 3rd party.  Of
course, I'm not privy to any negotiations that took place.  I do consider
WRI a national treasure, and want to feel confident that they have the
resources to continue to improve Mathematica.  So I would prefer to see
that they share with authors the revenues from derivative products.  Of
course, that's only IMHO.

I will in the future warn folks of the cost before sending them to the


----- Start Original Message -----
From: gardyloo
To: mathgroup at
Subject: [mg62151] Re: [mg62094] Re: [mg62060] Plot Angle between Vectors

> I'd just like to note that the DrawGraphics packages are now being
> sold on Kagi's site for $50 (link from David Park's site as posted
> below). Luckily, I got them before this change was made. We might want
> to be careful about pointing people there without telling them the
> (relatively new) cost. I love the DrawGraphics paradigm, and the things
> it makes easier and nice-looking, but there's no way I'd spend the
> for it.
> Curtis O.
> G. Raymond Brown wrote:
> >Florian,
> >
> >Vectors are straightforwardly represented in Mathematica as ordered
> >lists, as in vectorA={Ax,Ay,Az}. If you prefer the notation typically
> >used in introductory mathematics and physics courses, you can define
> >xhat={1,0,0}, yhat={0,1,0}, etc. If you know vector components and want
> >the angles, it's easy to get them from the definition of the Dot product.
> >
> >For drawings of vectors, use the Graphics or Graphics3D functions. Or,
> >you can download David Park's Drawing packages at
> > (There's a lot of other good stuff
> >there that may help you learn to use Mathematica.)
> >
> >-GRB-
> >
> >
> >
> >Floreian wrote:
> >
> >
> >
> >>I am a newbie to Mathematica, and i try to plot two vectors with the
> >>angle in-between. I could not find a code how to plot angles at all!
> >>Would be great if someone could help! Thanks a lot.
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >

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