I noticed a problem using R 2.7.1 on Windows XP SP2 with the precompiled
Atlas Rblas.dll. Running the code below causes R to crash. I started R
using Rgui --vanilla and am using the precompiled Atlas Rblas.dll from
cran.fhcrc.org dated 17-Jul-2007 05:04 for Core2 Duo.
The code that causes the crash:
x <- rnorm(100)
y <- rnorm(100)
z <- rnorm(100)
loess(z ~ x * y)
loess(z ~ x) does not cause a crash using the Atlas BLAS and neither does
running the above code with the Rblas.dll that came with R 2.7.1. In
addition, the code runs fine using the Atlas BLAS under R 2.6.2.
The windows error information that is printed to the screen when R closes:
AppName: rgui.exe AppVer: 2.71.45970.0 ModName: rblas.dll
ModVer: 2.51.42199.0 Offset: 000501cc
sessionInfo returns:
R version 2.7.1 (2008-06-23)
i386-pc-mingw32
locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
I checked the R FAQ, R for Windows FAQ, and the README associated with the
Atlas BLAS on CRAN and couldn't find any information related to possible
crash causes. I've used the ATLAS BLAS for about 6 months on this machine
(it's a new machine) with R 2.6.2.
Using debug(stats:::simpleLoess), I've found that the crash occurs on the
first iteration of the line:
z <- .C(R_loess_raw, as.double(y), as.double(x),
as.double(weights), as.double(robust), as.integer(D),
as.integer(N), as.double(span), as.integer(degree),
as.integer(nonparametric), as.integer(order.drop.sqr),
as.integer(sum.drop.sqr), as.double(span * cell),
as.character(surf.stat), fitted.values = double(N),
parameter = integer(7), a = integer(max.kd),
xi = double(max.kd), vert = double(2 * D), vval = double((D
+
1) * max.kd), diagonal = double(N), trL = double(1),
delta1 = double(1), delta2 = double(1), as.integer(surf.stat
==
"interpolate/exact"))
After that, I'm kind of stuck in terms of tracking it down.
Thanks for any input,
Jason Law
City of Portland, OR
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