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#' returns new defined names for unique row
#' @param x a numerical matrix with rownames
#' @param namesBySOM a numberic vector indicating species membership via som for input seqs with unique haplotype,i.e., unique(x or digitized x) has also been used for input of som or others.
#' @return a 2*n matrix, the 1st column the original labels/IDs/rownames of the matrix, the second unique ID/names/lables
#' @keywords unique2
#' @export
#' @author Ai-bing ZHANG,PhD. CNU, Beijing, CHINA, contact at zhangab2008(at)mail.cnu.edu.cn
#' @references Zhang et al. 2015.Initinally created on 2014/7/30 15:50:21
#' @description unique2() returns a 2-column character matrix where the first corresponds the original labels/IDs of the
#' input matrix (rownames, the input matrix must contain rownames!), the second unique ID/names/lables returned
#' by the function unique() with default parameter settings, or new IDs by som or other methods
#' @details returns a 2-column character matrix where the first corresponds the original labels/IDs,the second unique ID/names/lables returned by the function unique() with default parameter settings, or new IDs by som or other methods
#'
#' @examples
#' x<-array(1:12,c(3,4))
#' rownames(x)<-c("s1","s2","s3")
#' x<-rbind(x,x[3,])
#' rownames(x)[4]<-"s4"
#' namesBySOM<-c(1,2,2)
#' out<-unique2(x)
#' out
#' out<-unique2(x,namesBySOM)
#' out
library(testthat)
context("unique2: returns a 2-column character matrix where the first corresponds the original labels/IDs,the second unique ID...")
test_that("unique2: returns a 2-column character matrix where the first corresponds",{
x<-array(1:12,c(3,4))
rownames(x)<-c("s1","s2","s3")
x<-rbind(x,x[3,])
rownames(x)[4]<-"s4"
namesBySOM<-c(1,2,2)
out<-unique2(x,namesBySOM)
expect_that(class(out),
equals("matrix"))
})
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