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#
# Copyright 2013 Chris Pardy <cpardy@unsw.edu.au>
#
# This file is part of the mpmi R package.
#
# 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, version 3.
#
# 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/>.
#
# Function to handle cases where dpik() is unable to estimate
# a bandwidth, usually because a data vector has an interquartile range of 0.
dpikSafe <- function(x, ...)
{
result <- try(dpik(x, ...), silent = TRUE)
if (inherits(result, "try-error"))
{
msg <- geterrmessage()
if (grepl("scale estimate is zero for input data", msg))
{
warning("Using standard deviation as scale estimate, probably because IQR == 0")
result <- dpik(x, scalest = "stdev", ...)
} else
{
stop(msg)
}
}
return(result)
}
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