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# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General
# Public License along with this library; if not, write to the
# Free Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
# Copyrights (C)
# for this R-port:
# 1999 - Diethelm Wuertz, GPL
# 2007 - Rmetrics Foundation, GPL
# Diethelm Wuertz <wuertz@phys.ethz.ch>
# www.rmetrics.org
# for the code accessed (or partly included) from other R-ports:
# see R's copyright and license files
# for the code accessed (or partly included) from contributed R-ports
# and other sources
# see Rmetrics's copyright file
################################################################################
# MEHODS: SUBSETTING TIMEDATE OBJECTS:
# [.timeDate Extracts/replaces subsets from 'timeDate' objects
################################################################################
"[.timeDate" <-
function(x, ..., drop = TRUE)
{
# A function implemented by Diethelm Wuertz
# Description:
# Extracts or replaces subsets from 'timeDate' objects
# Arguments:
# x - a 'timeDate' object
# Value:
# Returns a subset from a 'timeDate' object.
# Changes:
#
# FUNCTION:
# Set Timezone to GMT:
myTZ = Sys.getenv("TZ")
Sys.setenv(TZ = "GMT")
on.exit(Sys.setenv(TZ = myTZ))
# Subsets:
z = as.POSIXlt(x@Data)
val <- lapply(z, "[", ..., drop = drop)
attributes(val) <- attributes(z)
val = as.POSIXct(val)
# Return Value:
new("timeDate",
Data = val,
format = x@format,
FinCenter = x@FinCenter)
}
#-------------------------------------------------------------------------------
"[<-.timeDate" <-
function(x, ..., value)
{
# A function implemented by Yohan Chalabi
# Description:
# Extracts or replaces subsets from 'timeDate' objects
# Arguments:
# x - a 'timeDate' object
# Value:
# Returns a subset from a 'timeDate' object.
# Changes:
#
# FUNCTION:
# Set Timezone to GMT:
myTZ = Sys.getenv("TZ")
Sys.setenv(TZ = "GMT")
on.exit(Sys.setenv(TZ = myTZ))
if (!inherits(value, "timeDate"))
value <- as.timeDate(value)
# Subsets:
z = as.POSIXlt(x@Data)
value <- as.POSIXlt(value@Data)
val <- "[<-"(z, ..., value)
val = as.POSIXct(val)
# Return Value:
new("timeDate",
Data = val,
format = x@format,
FinCenter = x@FinCenter)
}
################################################################################
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