Nothing
##
##
## Generic for trdsma trend
##
setGeneric(name = "trdsma", def = function(y, n.periods, trim = FALSE){standardGeneric("trdsma")})
##
## Methods for trdsma
## (in alphabetical order)
##
## for class data.frame
setMethod(f = "trdsma",
signature = c(y = "data.frame"),
definition = function(y, n.periods, trim = FALSE){
if(!all(apply(y, 2, is.numeric))){
stop("Data frame has non-numeric columns.\n")
}
trd <- as.data.frame(apply(y, 2, trdsma, n.periods = n.periods, trim = trim), ncol = ncol(y))
colnames(trd) <- colnames(y)
ifelse(trim, rownames(trd) <- rownames(y)[-c(1:(n.periods - 1))], rownames(trd) <- rownames(y))
return(as.data.frame(trd))
}
)
## for class matrix
setMethod(f = "trdsma",
signature = c(y = "matrix"),
definition = function(y, n.periods, trim = FALSE){
trd <- matrix(apply(y, 2, trdsma, n.periods = n.periods, trim = trim), ncol = ncol(y))
colnames(trd) <- colnames(y)
return(trd)
}
)
## for class mts
setMethod(f = "trdsma",
signature = c(y = "mts"),
definition = function(y, n.periods, trim = FALSE){
trd <- matrix(apply(y, 2, trdsma, n.periods = n.periods, trim = FALSE), ncol = ncol(y))
attributes(trd) <- attributes(y)
if(trim) trd <- window(trd, start = time(y)[n.periods])
return(trd)
}
)
## for class numeric
setMethod(f = "trdsma",
signature = c(y = "numeric"),
definition = function(y, n.periods, trim = FALSE){
n.periods <- abs(as.integer(n.periods))
if(n.periods > length(y)){
stop("\nNumber of periods is greater than length of series.\n")
}
trd <- c(filter(y, filter = rep(1 / n.periods, n.periods), sides = 1))
if(trim){
trd <- na.omit(trd)
}
return(trd)
}
)
## for class timeSeries
setMethod(f = "trdsma",
signature = c(y = "timeSeries"),
definition = function(y, n.periods, trim = FALSE){
trd <- apply(y, 2, trdsma, n.periods = n.periods, trim = FALSE)
trd <- timeSeries(trd, charvec = time(y))
if(trim) trd <- window(trd, start = time(y)[n.periods], end = end(y))
return(trd)
}
)
## for class ts
setMethod(f = "trdsma",
signature = c(y = "ts"),
definition = function(y, n.periods, trim = FALSE){
trd <- trdsma(c(y), n.periods = n.periods, trim = FALSE)
attributes(trd) <- attributes(y)
if(trim) trd <- window(trd, start = time(y)[n.periods])
return(trd)
}
)
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