#' delete of number
#'
#' @param n = Number to consider.
#' @param tol =Range of absolute values
#' @return
#' @export
del<-function(n=100,tol=1,keep=NULL,drop=NULL){
data_update2()
per<-num_per()/num_per(data=type2data[1:n,])
(del_num<-as.numeric(names(per[per<tol])))
temp<-c(setdiff(del_num,keep),drop)
temp<-temp[order(temp)]
num<-num_per()
num[temp]<-0
return(num)}
#del()
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