Box Me

November 8, 2013
By

(This article was first published on Drunks&Lampposts » R, and kindly contributed to R-bloggers)

Here’s a short R function I wrote to turn a long data set into a wide one for viewing. It’s not the most exciting function ever but I find it quite useful when my screen is wide and short. It simply cuts the data set horizontally into equal size pieces and puts them side by side. Lazy I know!


#'boxMe
#'
#'Turns an overly long data frame into something easier to look at
#'
#' @param d A dataframe or matrix
#' @param nrow The number of rows you would like to see in the new dataframe
#' @examples
#' test.set<-data.frame(x=rnorm(100), y=rnorm(100))
#' boxMe(test.set, 18)
#' 
#' library(ggplot2)
#' boxMe(diamonds, 10)


boxMe<-function(d, nrow){
  
  # Number of rows and columns
  r<-dim(d)[1]
  c<-dim(d)[2]
  
  rem<-r %% nrow # Number of blank rows
  reps<-floor(r/nrow) # Number of folds
  s<-seq(1, reps*nrow, by=nrow) # Breaks
  
  box<-d[1:nrow,] # First col
  
  for (i in s[-1]){

    ap<-d[i:(i+nrow-1),]
    box<-cbind(box, ap)
    
  }
  
  #Append remainder
  
  if (rem>0){
  
    n.null.rows<-nrow-rem
    rem.rows<-d[(reps*nrow+1):r,]
    null.block<-as.data.frame(matrix(rep(NA, (n.null.rows*c)), nrow=n.null.rows))
    names(null.block)<-names(rem.rows)
    last.block<-rbind(rem.rows, null.block)
    box<-cbind(box, last.block)
  
  }

  return(box)

}


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