Message-ID: <Pine.LNX.4.44.0505152144550.11207-100000@gw.env.leeds.ac.uk>
Date: 2005-05-15T20:49:24Z
From: Laura Quinn
Subject: Finding Gradient from Contour map
I have a detailed map matrix in R (x,y,z co-ords), and am wishing to
calculate the physical gradient at a number of points on the map wrt
different axes and averaged over a number of distances (i.e. slope in N-S
direction averaged over 10m, 50m, 100m respectively). Is there any
function within R which will allow for this?
Thanks,
Laura
Laura Quinn
Institute of Atmospheric Science
School of Earth and Environment
University of Leeds
Leeds
LS2 9JT
tel: +44 113 343 1596
fax: +44 113 343 6716
mail: laura at env.leeds.ac.uk