Re: adding matrices
- To: mathgroup at smc.vnet.net
- Subject: [mg65797] Re: adding matrices
- From: "J Siehler" <jsiehler at gmail.com>
- Date: Mon, 17 Apr 2006 02:28:53 -0400 (EDT)
- References: <e1sv6v$ct3$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
>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
If m and p have the same dimensions then Mathematica will subtract (or
add) entry-by-entry the way you want. You might want to clarify what
you mean by "subtracts [a matrix] from each 3x3 entry m" because that's
a little unclear; better, post your code so we can see what's
happening.
--
In[8]:=
m=Array[Random[Integer,{-10,10}]&,{3,3}]
p=Array[Random[Integer,{-10,10}]&,{3,3}]
Out[8]=
{{6,1,-7},{2,9,-3},{1,1,8}}
Out[9]=
{{1,9,5},{-3,-10,9},{9,5,6}}
In[10]:=
m-p
Out[10]=
{{5,-8,-12},{5,19,-12},{-8,-4,2}}