#
# 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/>.
xtsible <- function(x)
{
if(inherits(try(as.xts(x),silent=TRUE),'try-error')) {
FALSE
} else TRUE
}
use.xts <- try.xts <- function(x, ..., error=TRUE)
{
if(is.xts(x)) {
#attr(x,'.RECLASS') <- FALSE
return(x)
}
xx <- try(as.xts(x,..., .RECLASS=TRUE),silent=TRUE)
if(inherits(xx,'try-error')) {
if(is.character(error)) {
stop(error)
} else
if(is.function(error)) {
return(error(x, ...))
} else
if(error) {
stop(gsub('\n','',xx))
} else {
return(x)
}
} else {
# made positive: now test if needs to be reclassed
structure(xx, .RECLASS=TRUE)
}
}
.merge.xts.scalar <- function(x, length.out, ...) {
if( length(x) == 1 )
return(matrix(rep(x, length.out=length.out)))
if( NROW(x) == length.out )
return(x)
stop("improper length of one or more arguments to merge.xts")
}
use.reclass <- Reclass <- function(x) {
xx <- match.call()
xxObj <- eval.parent(parse(text=all.vars(xx)[1]), 1)
inObj <- try.xts(xxObj, error=FALSE)
xx <- eval(match.call()[[-1]])
reclass(xx, inObj)
}
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