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#' get tuple from the segmentation result
#' @param x a character vector or list
#' @param size a integer >= 2
#' @param dataframe return data.frame
#' @examples
#' get_tuple(c("sd","sd","sd","rd"),2)
#' @export
get_tuple = function(x,size=2,dataframe=T){
stopifnot(size > 1)
res = NULL
if(inherits(x,"character")){
stopifnot(length(x)>size)
if(.Platform$OS.type=="windows"){
x = enc2utf8(x)
}
}
if(inherits(x,"list")){
if(.Platform$OS.type=="windows"){
x = lapply(x,enc2utf8)
}
}
res = get_tuple_vector(x,size)
if(.Platform$OS.type=="windows"){
Encoding(names(res))="UTF-8"
}
if(dataframe == T) {
dd = data.frame(name = names(res),count = unlist(res,use.names = FALSE),stringsAsFactors = F)
return(dd[order(-dd[,2]),])
}
return(res)
}
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