cidxcn.f
subroutine cidxcn(x,y,e,n,nrel,nconc,nuncert,c,gamma,sd,outx)
implicit real*8 (a-h,o-z)
real*8 x(n),y(n),dx,dy
logical e(n),outx
real*8 nrel,nuncert,nconc
nconc=0d0
nrel=0d0
nuncert=0d0
sumr=0d0
sumr2=0d0
sumw=0d0
sumw2=0d0
sumrw=0d0
do 23000 i=1,n
wi=0d0
ri=0d0
do 23002 j=1,n
if(.not.(j.ne.i))goto 23004
dx=x(i)-x(j)
dy=y(i)-y(j)
if(.not.(dx.ne.0d0 .or. .not.outx))goto 23006
if(.not.((e(i).and.dy.lt.0d0).or.(e(i).and.
& .not.e(j).and.dy.eq.0d0)) ) goto 23008
if(.not.(dx.lt.0d0))goto 23010
nconc=nconc+1d0
wi=wi+1d0
goto 23011
23010 continue
if(.not.(dx.eq.0d0))goto 23012
nconc=nconc+.5d0
goto 23013
23012 continue
wi=wi-1d0
23013 continue
23011 continue
nrel=nrel+1d0
ri=ri+1d0
goto 23009
23008 continue
if(.not.((e(j).and.dy.gt.0d0).or.(e(j).and.
& .not.e(i).and.dy.eq.0d0)) ) goto 23014
if(.not.(dx.gt.0d0))goto 23016
nconc=nconc+1d0
wi=wi+1d0
goto 23017
23016 continue
if(.not.(dx.eq.0d0))goto 23018
nconc=nconc+.5d0
goto 23019
23018 continue
wi=wi-1d0
23019 continue
23017 continue
nrel=nrel+1d0
ri=ri+1d0
goto 23015
23014 continue
if(.not.(.not.(e(i).and.e(j))))goto 23020
nuncert=nuncert+1d0
23020 continue
23015 continue
23009 continue
23006 continue
23004 continue
23002 continue
sumr=sumr+ri
sumr2=sumr2+ri*ri
sumw=sumw+wi
sumw2=sumw2+wi*wi
sumrw=sumrw+ri*wi
23000 continue
c=nconc/nrel
gamma=2.*(c-.5d0)
sd=sumr2*sumw**2-2d0*sumr*sumw*sumrw+sumw2*sumr**2
sd=2d0*dsqrt(sd)/sumr/sumr
return
end