#' @export
dateIndexToInteger = function(index, data)
{
+ index = index[1]
if (is.numeric(index))
index = as.integer(index)
- #Undocumented "private" method to translate index --> date (is needed)
if (is.integer(index))
- return (index[1])
- if (is.character(index))
+ return (index)
+ if (inherits(index, "Date") || is.character(index))
{
- tryCatch(dt <- as.POSIXct(index[1]), finally=print("Unrecognized index format"))
+ tryCatch(dt <- as.POSIXct(index), error=function(e) stop("Unrecognized index format"))
#TODO: tz arg to difftime ?
- integerIndex <- as.integer( difftime(dt, data$getTime(1)) ) + 1
+ integerIndex <- round( (as.numeric( difftime(dt, data$getTime(1)) ))[1] ) + 1
if (integerIndex > 0 && integerIndex <= data$getSize())
- return (integerIndex)
+ {
+ #WARNING: if series start at date >0h, result must be shifted
+ date1 = as.POSIXlt(data$getTime(1)[1])
+ date2 = as.POSIXlt(data$getTime(2)[1])
+ shift = (date1$year==date2$year && date1$mon==date2$mon && date1$mday==date2$mday)
+ return (integerIndex + ifelse(shift,1,0))
+ }
stop("Date outside data range")
}
stop("Unrecognized index format")
}
+#' @title integerIndexToDate
+#'
+#' @description Transform an integer index to date index (relative to data)
+#'
+#' @param index Date (or integer) index
+#' @param data Object of class \code{Data}
+#'
+#' @export
+integerIndexToDate = function(index, data)
+{
+ index = index[1]
+ if (is.numeric(index))
+ index = as.integer(index)
+ if (!is.integer(index))
+ stop("'index' should be an integer")
+ as.Date( data$getTime(index)[1] )
+}
+
#' @title getSimilarDaysIndices
#'
#' @description Find similar days indices in the past