Nothing
"zinv"<-function(y){
y<-as.matrix(y)
n<-nrow(y)
yi<-y
abc1<-.Fortran("inv1",as.double(y),as.integer(n),yi=as.double(yi))
yi<-matrix(abc1$yi,nrow=n,byrow=T)
list(yi=yi)
}
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