Re: question about entering vectors by the keyboard
- To: mathgroup at smc.vnet.net
- Subject: [mg16919] Re: question about entering vectors by the keyboard
- From: Harald Giese <giese at dkrz.de>
- Date: Thu, 8 Apr 1999 02:32:31 -0400
- Organization: Institut fuer Meereskunde, Universitaet Hamburg
- References: <7e1cld$bc8@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"David P. Johnson" wrote:
>
> I have a question about entering vectors (1D lists) by keyboard.
> ...
David,
To enter a vector, just type the list:
v = {2, 3, 4}
In this case, v is a row-vector.
For a matrx type:
m = {{1, 2}, {3, 4}}
Here, m consits of the two row-vectors {1, 2} and {3, 4}.
Your "vector" {{2},{3},{4}} is in fact a matrix having the row-vectors
{2}, {3} and {4}.
MatrixForm just prints your list more readable, but does nothing else.
Have a look at the Matheamtica 3.0 online help "1.8.3 Vectors and Matrices".
Regards,
Harald
--
Harald Giese
Email: giese at dkrz.de
Phone: +49 (0)40 4123 5796; Fax: +49 (0)40 5605724
Institut fuer Meereskunde der Universitaet Hamburg
(Institute of Oceanography of the University of Hamburg)
Troplowitzstrasse 7, D-22529 Hamburg