https://github.com/cran/fields
Tip revision: e6e2dec9c9cc857b2226614aaf6c6642000af53c authored by Doug Nychka on 06 February 2009, 00:00:00 UTC
version 5.02
version 5.02
Tip revision: e6e2dec
evlpoly2.f
subroutine evlpoly2(x,n,nd,ptab,j,coef,result)
c evaluates a polynomial: coef(1) + sum_i= 2,j coef(i)x**i
integer j,n, i, nd
double precision x(n,nd), result(n), coef(j)
integer ptab(j,nd)
double precision temp, temp2
do 10 i = 1,n
temp= 0
c for a given vector accumlate the polynomial terms
do 20 kk= 1, j
temp2 =1.0
do 30 l=1, nd
if( ptab(kk,l).ne.0) then
temp2= temp2* (x(i,l)**ptab(kk,l))
endif
30 continue
temp = temp + temp2*coef(kk)
20 continue
result(i)= temp
10 continue
return
end