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 > >