3 #' Transform a (potential) date index into an integer (relative to data)
5 #' @param index Date (or integer) index
6 #' @param data Object of class \code{Data}
9 dateIndexToInteger = function(index, data)
11 #works on integers too: trust input
12 if (is.numeric(index))
13 index = as.integer(index)
14 if (is.integer(index))
17 if (inherits(index, "Date") || is.character(index))
19 tryCatch(indexAsDate <- as.Date(index), error=function(e) stop("Unrecognized index format"))
20 #TODO: tz arg to difftime ?
21 integerIndex <- round( as.numeric(
22 difftime(indexAsDate, as.Date(data$getTime(1)[1])) ) ) + 1
23 if (integerIndex >= 1 && integerIndex <= data$getSize())
25 stop("Date outside data range")
27 stop("Unrecognized index format")
32 #' Transform an integer index to date index (relative to data)
34 #' @param index Date (or integer) index
35 #' @param data Object of class \code{Data}
38 integerIndexToDate = function(index, data)
40 #works on dates too: trust input
41 if (is.character(index))
42 index = as.Date(index)
47 if (is.numeric(index))
48 index = as.integer(index)
49 if (!is.integer(index))
50 stop("'index' should be a date or integer")
51 as.Date( data$getTime(index)[1] )
54 #' getSimilarDaysIndices
56 #' Find similar days indices in the past
58 #' @param index Day index (numeric or date)
59 #' @param limit Maximum number of indices to return
60 #' @param same_seaon Should the indices correspond to day in same season?
63 getSimilarDaysIndices = function(index, limit, same_season)
65 index = dateIndexToInteger(index)
67 #TODO: mardi similaire à lundi mercredi jeudi aussi ...etc
70 #take all similar days in recent past
71 nb_days = min( (index-1) %/% 7, limit)
72 return ( rep(index,nb_days) - 7*seq_len(nb_days) )
75 #Look for similar days in similar season (+/- 30 days)
78 while (i >= 1 && length(days) < limit)
83 #look in the "future of the past"
87 #...and in the "past of the past"
93 # TODO: exact computation instead of -364
94 # 364 = closest multiple of 7 to 365 - drift along the years... but not so many years so OK
98 return ( days[1:min(limit,length(days))] )
103 #' Return a time-serie from its centered version + level
105 #' @param data A list as returned by \code{getData}
106 #' @param index The index to return
109 getSerie = function(data, index)
110 data[[index]]$centered_serie + data[[index]]$level
114 #' Get indices in data of no-NA series followed by no-NA, within [first,last] range.
116 #' @param data Object of class Data
117 #' @param first First index (included)
118 #' @param last Last index (included)
121 getNoNA2 = function(data, first, last)
123 (first:last)[ sapply(first:last, function(i)
124 !any( is.na(data$getCenteredSerie(i)) | is.na(data$getCenteredSerie(i+1)) )