R/global.R

In balance: Visualize Balances of Compositional Data

#' Package Check
#'
#' Checks whether the user has the required package installed.
#'  For back-end use only.
#'
#' @param package A character string. An R package.
packageCheck <- function(package){

  if(!requireNamespace(package, quietly = TRUE)){
    stop("Uh oh! This balance method depends on ", package, "! ",
         "Try running: install.packages('", package, "')")
  }
}

#' Make Long Data from Wide Data
#'
#' @param wide A data set in wide format.
#'
#' @return A data set in long format.
#'
#' @author Thom Quinn
#'
#' @examples
#' library(balance)
#' data(iris)
#' x <- iris[,1:4]
#' sbp <- sbp.fromPBA(x)
#' wide2long(sbp)
#'
#' @export
wide2long <- function(wide){

  # Force column names
  if(is.null(colnames(wide))){
    colnames(wide) <- paste0("Col", 1:ncol(wide))
  }

  # Force row names
  if(is.null(rownames(wide))){
    rownames(wide) <- as.character(rownames(wide))
  }

  df <- data.frame("value" = as.vector(as.matrix(wide)))
  df$variable <- unlist(lapply(colnames(wide), function(x) rep(x, nrow(wide))))
  df$id <- rownames(wide)
  return(df)
}