[R] Finding Gradient from Contour map

From: Laura Quinn <laura_at_env.leeds.ac.uk>
Date: Mon 16 May 2005 - 06:49:24 EST


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@env.leeds.ac.uk



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