[GRASSLIST:171] RE: calculating distances

[Patton, Eric]

If you have 2000 'girls' and 10 years of observations, with 2000
observations per year, then you have 2000 * 2000 * 10 = 40,000,000
'observations'.

Can you explain more about the dataset? It's not clear what kind of data
you're using or how it's organized - like what does an 'observation'
measure? Does your data exist in a dbf or database? etc, etc...

 --
Eric Patton 
epatton at nrcan.gc.ca

-----Original Message-----
From: owner-GRASSLIST at baylor.edu [mailto:owner-GRASSLIST at baylor.edu] On
Behalf Of Scott Cunningham
Sent: Thursday, March 16, 2006 8:22 AM
To: GRASSLIST at baylor.edu
Subject: [GRASSLIST:164] calculating distances

I've been reading more, and I realize now that it is possible to perform
distance calculations with GRASS.  Cane someone give me a sense of how long
it will take, though?  My dataset consists of 2000 young girls with multiple
observations over time (ie, 10 years of 2000 observations on the same girl).
I have to calculate, therefore, 20,000 separate distances.  How long will
this probably take?