https://github.com/cran/fields
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Tip revision: ce722edae3c1b9e1af2985ce3500b11058facf0e authored by Doug Nychka on 24 August 2006, 01:46:17 UTC
version 3.04
Tip revision: ce722ed
double.exp.R
double.exp<- function(x) {
# double exponential weight function 
       .5* exp(-abs(x))
    }
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