Re: matrix[m,n]

*To*: mathgroup at smc.vnet.net*Subject*: [mg116010] Re: matrix[m,n]*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Sat, 29 Jan 2011 05:25:41 -0500 (EST)

On 1/28/11 at 6:11 AM, he.frauendorfer at t-online.de (EF) wrote: >is there a "simple kernel based" routine to do the scalar product of >two one dimensional vectors, producing the m,n Matrix: >v1[m,1].v2[n,1] -> mat[m,n] It isn't entirely clear to me what you want to accomplish. The dot product of two vectors will never be a matrix. In Mathematica the notation v1[m,1] is the function v1 evaluated at arguments m and 1. It is definitely not a vector. I am going to guess you want to do something like In[11]:= v1 = RandomInteger[{-5, 5}, {3}]; v2 = RandomInteger[{10, 20}, 5]; Outer[Times, v1, v2] Out[13]= {{-34, -26, -24, -36, -28}, {-68, -52, -48, -72, -56}, {51, 39, 36, 54, 42}}