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# Part of the mi package for multiple imputation of missing data
# Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Trustees of Columbia University
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
## these change the link function used in the imputation process
setMethod("change_link", signature(data = "missing", y = "missing_variable", to = "character"), def =
function(y, to) {
fam <- do.call(y@family$family, args = list(link = to))
y@family <- fam
validObject(y, complete = TRUE)
return(y)
})
setMethod("change_link", signature(data = "missing", y = "missing_variable", to = "missing"), def =
function(y, to) {
cat("Likely choices include:", y@known_links, sep = "\n")
return(invisible(NULL))
})
setMethod("change_link", signature(data = "missing_data.frame", y = "character", to = "character"), def =
function(data, y, to) {
if(length(to) == 1) to <- rep(to, length(y))
else if(length(to) != length(y)) stop("'y' and 'to' must have the same length")
if(all(y %in% names(getClass("missing_variable")@subclasses))) {
classes <- sapply(data@variables, class)
y <- c(sapply(y, FUN = function(x) {
names(classes[which(classes == x)])
}))
if(is.list(y)) stop(paste("no variables of class", names(y)[1]))
else y <- y[1]
}
y <- match.arg(y, data@DIMNAMES[[2]], several.ok = TRUE)
for(i in 1:length(y)) {
data@variables[[y[i]]] <- change_link(y = data@variables[[y[i]]], to = to[i])
}
return(invisible(data))
})
setMethod("change_link", signature(data = "missing_data.frame", y = "numeric", to = "character"), def =
function(data, y, to) {
if(length(to) == 1) to <- rep(to, length(y))
else if(length(to) != length(y)) stop("'y' and 'to' must have the same length")
for(i in 1:length(y)) {
data@variables[[y]] <- change_link(y = data@variables[[y]], to = to[i])
}
return(invisible(data))
})
setMethod("change_family", signature(data = "missing_data.frame", y = "logical", to = "character"), def =
function(data, y, to) {
if(length(y) != data@DIM[2]) {
stop("the length of 'y' must equal the number of variables in 'data'")
}
return(change_link(data, which(y), to))
})
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