Re: vector multiplication

*To*: mathgroup at smc.vnet.net*Subject*: [mg25539] Re: vector multiplication*From*: Alberto Ruiz <ARuiz at um.es>*Date*: Sat, 7 Oct 2000 03:35:43 -0400 (EDT)*Organization*: University of Murcia, Spain*References*: <8rjjdh$ofq@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Yannis, in Mathematica there is no difference between row and column vectors, but you can use matrices: {{a,b,c}} is a row vector {{a},{b},{c}} is a column vector. You can also use Outer[Times,list1,list2] to get the product of a column vector list1 and a row vector list2. But note that the diagonal elements of the outer product of a vector and itself is just v v (a vector with the elements squared). Alberto Yannis.Paraskevopoulos at ubsw.com wrote: > > Hi there, > > Could you please help me with the following: > > Assume the v is a vector (1xk). I would like to calculate the v'v and > then take all the diagonal elements. >