https://github.com/cran/fields
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Tip revision: 92636eaee56714c89c7b7e7cdc52e0c77aeb79b3 authored by Doug Nychka on 07 February 2005, 00:00:00 UTC
version 2.3
Tip revision: 92636ea
double.exp.R
double.exp<- function(x) {
# double exponential weight function 
       .5* exp(-abs(x))
    }
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