Re: Re: Plot Angle between Vectors

*To*: mathgroup at smc.vnet.net*Subject*: [mg62151] Re: [mg62094] Re: [mg62060] Plot Angle between Vectors*From*: "G. Raymond Brown" <gbrown at runbox.com>*Date*: Sat, 12 Nov 2005 03:33:09 -0500 (EST)*References*: <200511100750.CAA07329@smc.vnet.net> <200511110751.CAA29626@smc.vnet.net> <437527FF.4040903@mail.wsu.edu>*Sender*: owner-wri-mathgroup at wolfram.com

Curtis, 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 site. -GRB- ----- Start Original Message ----- From: gardyloo To: mathgroup at smc.vnet.net 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 money > 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 > >http://home.earthlink.net/~djmp/. (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. > >> > >> > >> > >> > > > > > > > > > > > >

**Follow-Ups**:**Re: Re: Re: Plot Angle between Vectors***From:*gardyloo <gardyloo@mail.wsu.edu>

**References**:**Plot Angle between Vectors***From:*"Florian" <florian.haeusler@googlemail.com>

**Re: Plot Angle between Vectors***From:*"G. Raymond Brown" <gbrown@runbox.com>