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Smoothing <- function(var, runmeanlen = 12, numdimt = 4) {
# Smoothes time-series organized in a matrix of any number of dimensions up
# to 10 dimensions (arbitrary choice, can be enlarged if needed --> ask
# Virginie)
#
# Args:
# var: Matrix in which are the time-series to smooth.
# runmeanlen: Running mean length in number of time-steps (typically
# months).
# numdimt: Dimension along with to smooth.
#
# Returns:
# Matrix with same dimensions as var and smoothed time-series along the
# (numdimt)th dimension.
#
# History:
# 1.0 # 2011-03 (V. Guemas, vguemas@ic3.cat) # Original code
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#
# Enlarge the number of dimensions of var to 10 --> enlvar
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dimsvar <- dim(var)
if (is.null(dimsvar)) {
dimsvar <- length(var)
}
u <- inilistdims(dimsvar, 10)
enlvar <- enlarge(var, 10)
#
# Smoothing
# ~~~~~~~~~~~
smt_enlano <- array(dim = c(dimsvar, array(1, dim = (10 - length(dimsvar)))))
nmr1 <- floor(runmeanlen / 2)
nltime <- dimsvar[numdimt]
for (jtime in (1+nmr1):(nltime - nmr1)) {
# First, averaging the two extreme values
u[[numdimt]] <- jtime - nmr1
left <- enlvar[u[[1]], u[[2]], u[[3]], u[[4]], u[[5]], u[[6]], u[[7]],
u[[8]], u[[9]], u[[10]]]
u[[numdimt]] <- jtime + nmr1
right <- enlvar[u[[1]], u[[2]], u[[3]], u[[4]], u[[5]], u[[6]], u[[7]],
u[[8]], u[[9]], u[[10]]]
u[[numdimt]] <- jtime
smt_enlano[u[[1]], u[[2]], u[[3]], u[[4]], u[[5]], u[[6]], u[[7]], u[[8]],
u[[9]], [[10]]] <- (left + right) / (2 * (2 * nmr1))
if (nmr1 > 0) {
for (k in - (nmr1 - 1):(nmr1 - 1)) {
# Second, adding the equally-weighted values around the centered
u[[numdimt]] <- jtime + k
mid <- enlvar[u[[1]], u[[2]], u[[3]], u[[4]], u[[5]], u[[6]], u[[7]],
u[[8]], u[[9]], u[[10]]]
u[[numdimt]] <- jtime
smt_enlano[u[[1]], u[[2]], u[[3]], u[[4]], u[[5]], u[[6]], u[[7]],
u[[8]], u[[9]], u[[10]]] <- smt_enlano[u[[1]], u[[2]],
u[[3]], u[[4]], u[[5]], u[[6]],
u[[7]], u[[8]], u[[9]], u[[10]]]
+ (mid / (2 * nmr1))
}
#
# Reduce the number of dimensions to the original one
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
smt_ano <- array(dim = dimsvar)
smt_ano[] <- smt_enlano
#
# Outputs
# ~~~~~~~~~
#
smt_ano