Re: Lists: Row Vectors vs. Column Vectors. (feels like such a silly

• To: mathgroup at smc.vnet.net
• Subject: [mg110221] Re: Lists: Row Vectors vs. Column Vectors. (feels like such a silly
• From: "Kevin J. McCann" <Kevin.McCann at umbc.edu>
• Date: Wed, 9 Jun 2010 07:19:40 -0400 (EDT)
• References: <hul8be\$if4\$1@smc.vnet.net>

```However,

a = Range[5]
a.a gives the dot product, but Transpose[a].a doesn't work. Since I do
this a lot, I agree with the sense of the original post that some of the
matrix/vector operations are not very user friendly.

Kevin

David Park wrote:
>
> vector = Range[5];
> MatrixForm[vector, TableDirections -> Row]
>
> (1	2	3	4	5 )
>
>
> David Park
> djmpark at comcast.net
> http://home.comcast.net/~djmpark/
>
>
> From: telefunkenvf14 [mailto:rgorka at gmail.com]
>
>
> Group:
>
> I'm trying to understand the *reasoning* behind Mathematica's treatment of
> lists, rows and columns. Basically, I feel like I'm in a weird place---
> I get what's going on well enough to translate various econometric
> examples, but I wouldn't be able to clearly explain Mathematica's behavior
> to
> someone previously exposed to matrix programming in Gauss, SAS IML,
> etc.
>
> Can someone explain why a list does not display in MatrixForm as a
> row?---It's ok if the answer is computer sciency. I'll take some advil
> before I attempt to digest any answers. :)
>
> -RG
>
>
>

```

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