# Copyright (C) 2005 Heather Turner
#
# 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 or 3 of the License
# (at your option).
#
# 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.
#
# A copy of the GNU General Public License is available at
# http://www.r-project.org/Licenses/
psum <- function(...) {
summandList <- list(...)
nSummands <- length(summandList)
if (nSummands == 0) return(0)
else if (nSummands == 1) return(summandList[[1]])
else {
trySum <- try(summandList[[1]] + do.call("Recall", summandList[-1]),
silent = TRUE)
if (inherits(trySum, "try-error"))
stop("addition not implemented for types of argument supplied")
else trySum
}
}
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.