       Re: adding matrices

• To: mathgroup at smc.vnet.net
• Subject: [mg65784] Re: [mg65755] adding matrices
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Mon, 17 Apr 2006 02:28:42 -0400 (EDT)
• Reply-to: hanlonr at cox.net
• Sender: owner-wri-mathgroup at wolfram.com

```Works fine on my system

\$Version

5.2 for Mac OS X (June 20, 2005)

m=Array[a,{3,3}];

p=Array[b,{3,3}];

m-p

{{a[1, 1] - b[1, 1], a[1, 2] - b[1, 2], a[1, 3] - b[1, 3]},
{a[2, 1] - b[2, 1], a[2, 2] - b[2, 2], a[2, 3] - b[2, 3]},
{a[3, 1] - b[3, 1], a[3, 2] - b[3, 2], a[3, 3] - b[3, 3]}}

Bob Hanlon

>
> From: francis hu7xley <ac7220 at wayne.edu>
To: mathgroup at smc.vnet.net
> Subject: [mg65784] [mg65755] adding matrices
>
> [This post has been delayed due to email problems - moderator]
>
>
> am fairly new to mathematica. simply want to add two 3x3
> matrices together(actually, subtract). if they are called
> m and p, if i type m-p, mathematica treats the second matrix p as a scalar
and subtracts that entire 3x3 matrix p from each entry of m. the help
contents do not seem to address this issue!!! there must be a simple way of
doing this??
>
> thanks in advance for any help
>
>

```

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