R/subset.lfdata.R

In fda.usc: Functional Data Analysis and Utilities for Statistical Computing

#' @title Subsetting
#' 
#' @description Return subsets of \code{fdata} which meet conditions.
#' 
#' @param x object to be subsetted (\code{fdata} class).
#' @param subset logical expression indicating elements or rows to keep.
#' @param select logical expression indicating points or columns to keep.
#' @param drop passed on to \code{[} indexing operator.
# @param list() further arguments to be passed to or from other methods.
#' @param \dots Further arguments passed to or from other methods.
#' 
#' @return An object similar to \code{x} contain just the selected elements.
#' 
#' @seealso See \code{\link{subset}} and \code{\link{fdata}}.
#' 
#' @rdname subset.fdata
#' @aliases subset.fdata
#' @export
subset.fdata<-function(x,subset,select,drop=TRUE,...){
  if (!is.fdata(x)) stop("No fdata class object")
  if (missing(select) & missing(subset)) stop("You must specify at least the argument 'subset' or 'select'")
  if (missing(subset)) subset<-!logical(nrow(x$data))
  range<-TRUE
  if (missing(select)) {
    range<-FALSE
    select<-1:ncol(x$data)
  }
  if (is.numeric(subset)) {
    subset2<-logical(nrow(x$data))
    subset2[subset]<-TRUE
    subset<-subset2    
  }
  newx<-x
  newx$data<-subset(x$data,subset,select,drop=drop,...)
  #print(select)
  newx$argvals<-newx$argvals[select]
  if (range) newx$rangeval<-c(min(newx$argvals),max(newx$argvals))
  return(invisible(newx))
}
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# ################################################################################
# plot.lfdata<-function(lfdata,ask=FALSE,color,...){
#   mf=5
#   nvar<-length(lfdata)
#   if (nvar>4) ask=TRUE
#   if (ask) {par(mfrow = c(1, 1))
#             dev.interactive()
#             oask <- devAskNewPage(TRUE)
#             on.exit(devAskNewPage(oask))}
#   else{    mf<-switch(nvar,
#                       "1"={c(1,1)},
#                       "2"={c(1,2)},
#                       "3"={c(1,3)},
#                       "4"={c(2,2)})            
#            par(mfrow =mf)                    }
#   names1<-names2<-names<-lfdata[[1]][["names"]]
#   names1$main<-"Multivariate Functional Data"
#   #    tr<-paste("mode.tr",trim*100,"\u0025",sep="")         
#   nam<-names(lfdata)
#   
#   if (is.null(nam)) nam<-1:nvar
#   for (idat in 1:nvar) {
#     data<-lfdata[[idat]]$data
#     tt<-lfdata[[idat]]$argvals
#     rtt<-lfdata[[idat]]$rangeval
#     if (missing(color)) color2<-1
#     else {
#       if (is.list(color)) color2<-color[[idat]]
#       else color2<-color
#     }
#     plot(lfdata[[idat]], col =  color2,lty=1, main =nam[idat],...)
#   }
#   
# }
# ################################################################################
# is.lfdata=function(lfdata){
# n=nrow(lfdata[[1]])
# lo1=all(unlist(lapply(lfdata,nrow))==n)
# if (!lo1) warning("The number of rows are different")
# lo2=all(unlist(lapply(lfdata,is.fdata)))
# if (!lo2) warning("Not all components are fdata")
# return( lo1 & lo2 )
# }
# ################################################################################
# "[.lfdata"=function(lfdata,i){
# if (missing(i)) return(lfdata)
# res=lapply(lfdata,"[",i)
# class(res)="lfdata"
# return(res)
# }
# ################################################################################
# subset.lfdata<-function(x,subset,...){
#   #if (any(class(x)!="lfdata")) stop("No list class object")
#   nvar<-length(x)
#   namx=names(x)
#   if (missing(subset)) subset<-!logical(nrow(x[[1]]))
#   if (is.numeric(subset) & max(subset)<nrow(x[[1]])) {
#     subset2<-logical(nrow(x[[1]]))
#     subset2[subset]<-TRUE
#     subset<-subset2    
#   }  
#   newx<-x
#   for (i in 1:nvar){
# 	if (is.fdata(x[[i]])) {
#     newx[[i]]<-subset.fdata(x[[i]],subset,...)
# 		} else {
# 	newx[[i]]<-subset(x[[i]],subset,...)	
# 		}
#   } 
#   return(invisible(newx))
# }
# ################################################################################

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