Re: vector[m,1] vector[n,1] matrix[m,n]

• To: mathgroup at smc.vnet.net
• Subject: [mg116019] Re: vector[m,1] vector[n,1] matrix[m,n]
• From: DrMajorBob <btreat1 at austin.rr.com>
• Date: Sat, 29 Jan 2011 05:27:30 -0500 (EST)

```I think that's called an outer product:

mv = Array[m, {5}]
nv = Array[n, {3}]

{m[1], m[2], m[3], m[4], m[5]}

{n[1], n[2], n[3]}

Outer[Times, mv, nv]

{{m[1] n[1], m[1] n[2], m[1] n[3]}, {m[2] n[1], m[2] n[2],
m[2] n[3]}, {m[3] n[1], m[3] n[2], m[3] n[3]}, {m[4] n[1],
m[4] n[2], m[4] n[3]}, {m[5] n[1], m[5] n[2], m[5] n[3]}}

Bobby

On Fri, 28 Jan 2011 05:11:09 -0600, EF <he.frauendorfer at t-online.de> wrote:

> Hi,
>
> 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]
>
>
>
> Thanks    E.F.
>

--
DrMajorBob at yahoo.com

```

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