Nothing
hcvc.fun.default <-
function(Vec,bw=NULL,type_data,ker,a0=0,a1=1,...)
{
if(is.null(bw)) {
bw=seq((max(Vec)-min(Vec))/200,(max(Vec)-min(Vec))/2, length.out=100)
}
result1<-0
result2<-0
x=seq(min(Vec),max(Vec),length.out=100)
n1 <- length(x)
n2 <- length(Vec)
m1=matrix(0,n1,length(Vec))
m2=matrix(0,n2,n2)
Dak<-Vectorize(kef,vectorize.args=c('x','t'))
for(k in 1:length(bw)){
m1 <-outer(x,Vec,Dak,bw[k],"continuous",ker,a0,a1)
m2 <-outer(Vec,Vec,Dak,bw[k],"continuous",ker,a0,a1)
res1<-apply(m1,1,mean)
diag(m2)<-0
res2<-apply(m2,1,sum)
result1[k]=simp_int(x,res1^2)
result2[k]=(2/((n2-1)*n2))*sum(res2)
}
CV=result1-result2
index<-which.min(CV) #to compute the optimal bandwidth
hcv<-bw[index]
structure(list(hcv=hcv,seq_h=bw,CV=CV),class="hcvc.fun")
}
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