#
# 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/>.
`indexFormat` <-
function(x) {
attr(x, '.indexFORMAT')
}
`indexFormat<-` <-
function(x, value) {
UseMethod('indexFormat<-')
}
`indexFormat<-.xts` <-
function(x, value) {
if(!is.character(value) && !is.null(value))
stop('must provide valid POSIX formatting string')
attr(x, '.indexFORMAT') <- value
x
}
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