As can be seen below, adding a NA to the y values
in a call to isoreg results in a segfault.
ir4 <- isoreg(1:10, y4 <- c(5, 9, 1:2, 5:8, NA, 8))
Adding missing values to the x values, on the contrary,
gives an error, but maybe the error message could be
tailored to this particular situation.
y <- c(5, 9, 1:2, 5:8, 3, 8)
x <- c(1:9, NA)
isoreg(x, y)
## error message: Error in if (!isOrd) { : missing value where
TRUE/FALSE needed
Please find below a (temporary) patch (against Revision 43692)
for both the R source and the help file.
Kind regards,
Tobias
### patch isoreg.R ###
--- isoreg.R 2007-12-14 19:07:47.000000000 +0100
+++ isoreg2.R 2007-12-14 19:11:20.000000000 +0100
@@ -18,6 +18,9 @@
##
isoreg <- function(x, y=NULL)
{
+ if (any(is.na(x))) stop("x may not contain NA values")
+ if (any(is.na(y))) stop("y may not contain NA values")
+
xy <- xy.coords(x,y)
x <- xy$x
isOrd <- (!is.null(xy$xlab) && xy$xlab == "Index") || !is.unsorted(x)
### patch isoreg.Rd ###
--- isoreg.Rd 2007-12-14 19:08:12.000000000 +0100
+++ isoreg2.Rd 2007-12-14 19:15:00.000000000 +0100
@@ -20,6 +20,7 @@
\item{x, y}{%in \code{isoreg},
coordinate vectors of the regression points. Alternatively a single
plotting structure can be specified: see \code{\link{xy.coords}}.
+ The coordinate vectors may not contain missing values.
}
}
\details{
### sessionInfo() information segfault ###
R version 2.6.0 (2007-10-03)
i486-pc-linux-gnu
locale:
LC_CTYPE=en_US.ISO-8859-15;LC_NUMERIC=C;LC_TIME=en_US.ISO-8859-15;LC_COLLATE=en_US.ISO-8859-15;LC_MONETARY=en_US.ISO-8859-15\
;LC_MESSAGES=en_US.ISO-8859-15;LC_PAPER=en_US.ISO-8859-15;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.ISO-885\
9-15;LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
ir4 <- isoreg(1:10, y4 <- c(5, 9, 1:2, 5:8, NA, 8))
*** caught segfault ***
address 0x24, cause 'memory not mapped'
Process R segmentation fault (core dumped) at Fri Dec 14 17:48:22 2007