RE: Distance between to points in r^3
- To: mathgroup at smc.vnet.net
- Subject: [mg41587] RE: [mg41576] Distance between to points in r^3
- From: "David Park" <djmp at earthlink.net>
- Date: Wed, 28 May 2003 04:57:22 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Ronny,
Another method.
v1 = {3, 4, 5};
v2 = {6, 7, 8};
Doing it step by step, all in one cell...
v2 - v1
%^2
Plus @@ %
Sqrt[%]
Subtraction of vectors is subtraction of the elements.
% refers to the previous output.
Squaring a vector squares the elements.
@@ is Apply and Plus @@ % changes the list to a sum.
Doing it all at once...
Sqrt[Plus @@ ((v2 - v1)^2)]
The parentheses are necessary.
David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/
From: Ronny Mandal [mailto:ronnyma at math.uio.no]
To: mathgroup at smc.vnet.net
Hi.
Assume that I've got to vectors (3,4,5) and (6,7,8).How do I
calculate the distance between them?
Thanks in advance.
Ronny M