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Re: vector representation

  • To: mathgroup at
  • Subject: [mg82765] Re: vector representation
  • From: Jens-Peer Kuska <kuska at>
  • Date: Tue, 30 Oct 2007 05:44:10 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <fg6r8c$e19$>
  • Reply-to: kuska at


no you have the unit vectors i, j, k. These vectors form a basis in 3d 
space and you can represent any vector by it's coordinates as a List[]
{a,b,c} and you can just type
{a,b,c}+{d,e,f} to get the vector addition of {a,b,c} and {d,e,f}.


Vlad Luca wrote:
> Hi,
> Having the vector r(a,b,c) = {a i, b j, c k} where i, j, k are the unit vectors and a, b, c arbitrary coefficients, I want to calculate, for example r(1,2,1) etc. Also I want to be able to add 2 or more of such vectors trough their indexes, for example: r(0,0,1) + r(1,2,3) and the sum to be expressed like this r(1,2,4) and not like {1i, 2j, 4k}.
> Thank You in advance!

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