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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 Description. 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
################################################################################
# FUNCTION: DESCRIPTION:
# getCall Extracts the call slot from a S4 object
# getModel Extracts the model slot from a S4 object
# getTitle Extracts the title slot from a S4 object
# getDescription Extracts the description slot from a S4 object
# getSlot Extracts a specified slot from a S4 object
# getArgs Shows the arguments of a S4 functiong
################################################################################
if(getRversion() < "2.14") {
getCall <- function(x) slot(x, "call")
} ## since 2.14.0, getCall() is an S3 generic in 'stats'
## *AND* its default method also works for S4 and a "call" slot
# ------------------------------------------------------------------------------
getModel <-
function(object)
{
# A function implemented by Tobias Setz
# FUNCTION:
# Return Value:
UseMethod("getModel")
}
getModel.default <-
function(object)
{
# A function implemented by Rmetrics
# Description:
# gets the "model" slot from an object of class 4
# Arguments:
# object - an object of class S4
# FUNCTION:
# Return Value:
slot(object, "model")
}
# ------------------------------------------------------------------------------
getTitle <-
function(object)
{
# A function implemented by Rmetrics
# Description:
# gets the "title" slot from an object of class 4
# Arguments:
# object - an object of class S4
# FUNCTION:
# Return Value:
slot(object, "title")
}
# ------------------------------------------------------------------------------
getDescription <-
function(object)
{
# A function implemented by Rmetrics
# Description:
# Extracts the "description" slot from an object of class 4
# Arguments:
# object - an object of class S4
# FUNCTION:
# Return Value:
slot(object, "description")
}
# ------------------------------------------------------------------------------
getSlot <-
function(object, slotName)
{
# a simple wrapper around slot to avoid compatibilty troubles with
# other packages.
# FUNCTION:
slot(object, slotName)
}
# ------------------------------------------------------------------------------
getArgs <-
function(f, signature = character())
{
# A function implemented by Diethelm Wuertz
# Description:
# Shows the arguments of a S4 functiong
# Arguments:
# f - a generic function or the character-string name of one
# signature - the signature of classes to match to the arguments
# of f
# Note:
# such a function is missing in the methods package,
# see, e.g he function getMethod()
# FUNCTION:
# Get arguments:
fun <- getMethod(f, signature)@.Data
test <- class(try(body(fun)[[2]][[3]], silent = TRUE))
if (test == "function") {
ans <- args(body(fun)[[2]][[3]])
} else {
ans <- args(fun)
}
cat(substitute(f), ",", paste(signature, collapse = ","), ":\n",
sep = "")
# Return Value:
ans
}
################################################################################
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