#
# xts: eXtensible time-series
#
# Copyright (C) 2008 Jeffrey A. Ryan jeff.a.ryan @ gmail.com
#
# Contributions from Joshua M. Ulrich
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# functions to handle zoo <--> xts conversions
`re.zoo` <-
function(x,...) {
xx <- coredata(x)
xx <- zoo(xx,
order.by=index(x),
...)
if(length(dimnames(x)[[2]]) < 2) {
dimnames(xx) <- NULL
dim(xx) <- NULL
attr(xx,'names') <- as.character(index(x))
}
xx
}
`as.xts.zoo` <-
function(x,order.by=index(x),frequency=NULL,...,.RECLASS=FALSE) {
if(.RECLASS) {
xx <- xts(coredata(x), # Cannot use 'zoo()' on objects of class 'zoo' - jmu
order.by=order.by,
frequency=frequency,
.CLASS='zoo',
...)
} else {
xx <- xts(coredata(x), # Cannot use 'zoo()' on objects of class 'zoo' - jmu
order.by=order.by,
frequency=frequency,
...)
}
#
# if(!is.null(attr(x,'names'))) {
# dim(xx) <- c(NROW(xx),NCOL(xx))
# dn <- list(attr(x,'names'),colnames(x))
# dimnames(xx) <- dn
# attr(xx,'.ROWNAMES') <- attr(x,'names')
# }
#
xx
}
`as.zoo.xts` <-
function(x,...) {
cd <- coredata(x);
if( length(cd)==0 )
cd <- NULL
zoo(cd,
order.by=index(x),
...)
}
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