Re: Re: Re: coordinate transformation

*To*: mathgroup at smc.vnet.net*Subject*: [mg13373] Re: [mg13308] Re: [mg13169] Re: [mg13117] coordinate transformation*From*: David Withoff <withoff>*Date*: Mon, 20 Jul 1998 02:50:27 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Sean Ross wrote: > Take any two cartesian vectors with one end at the origin and the other > at some arbitrary point. We represent them by ordered triplets, > {x1,y1,z1} and {x2,y2,z2}. Lets convert them into spherical > coordinates: {Sqrt[x1^2+y1^2+z2^2],0,0} and > {Sqrt[x2^2+y2^2+z2^2],0,0}. Followed by: > You ought to object at this point YES!!!! Are you seriously suggesting that, for example, CoordinatesFromCartesian[{1,1,1},Spherical] should return {Sqrt[3],0,0} ??? > I am only illustrating broad concepts, not telling > you exactly how to write your programs, nor writing a textbook on the > subject of vector analysis. You don't need to write a textbook. Even a single specific example of how a single specific function should behave would be helpful. Dave Withoff Wolfram Research