))
mappings.cnas cnas[,c("ensembl_gene_id", "hgnc_symbol", "chromosome_name", "start_position",..."end_position")]
#获取过滤后基因的映射坐标
chr.st.cnas cnas$chromosome_name, mappings.cnas$start_position..., sep = " ")
order.map.cnas cnas), chr.st.cnas)
mappings.cnas cnas...[order.map.cnas, ]
if (length(which(duplicated(mappings.cnas))) > 0)
mappings.cnas cnas...[-which(duplicated(mappings.cnas)), ]
mappings.cnas cnas) %>% dplyr::filter