[R] Problem with expand.grid

[Keith Jewell]

Hi All,

This example code
----------------
dDF <- structure(list(y = c(4.75587, 4.8451, 5.04139, 4.85733, 5.20412,
 5.92428, 5.69897, 4.78958, 4, 4), t = c(0, 48, 144, 192, 240,
 312, 360, 0, 48, 144), Batch = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1
 ), T = c(2, 2, 2, 2, 2, 2, 2, 2, 2, 2), pH = c(4.6, 4.6, 4.6,
 4.6, 4.6, 4.6, 4.6, 4.6, 4.6, 4.6), S = c(0, 0, 0, 0, 0, 0, 0,
 0, 0, 0), N = c(0, 0, 0, 0, 0, 0, 0, 80, 80, 80)), .Names = c("y",
 "t", "Batch", "T", "pH", "S", "N"), row.names = c(NA, 10L), class = 
"data.frame")
str(dDF)
expand.grid(dDF)
------------------------------------
'hangs' for a while and then gives an error

Error in `[[<-.data.frame`(`*tmp*`, i, value = c(4.75587, 4.8451, 5.04139, 
:
  replacement has 10000000 rows, data has 10

In NEWS.R-2.11.0dev I read:
    o	The new (in 2.9.0) 'stringsAsFactors' argument to expand.grid()
	was not working: it now does work but has default TRUE for
	backwards compatibility.

but I don't think that's relevant, I have no factors.

I'm probably being silly. Can anyone point out where?

Best...

Keith Jewell

--please do not edit the information below--

Version:
 platform = i386-pc-mingw32
 arch = i386
 os = mingw32
 system = i386, mingw32
 status = Patched
 major = 2
 minor = 10.1
 year = 2009
 month = 12
 day = 21
 svn rev = 50796
 language = R
 version.string = R version 2.10.1 Patched (2009-12-21 r50796)

Windows Server 2003 x64 (build 3790) Service Pack 2

Locale:
LC_COLLATE=English_United Kingdom.1252;LC_CTYPE=English_United 
Kingdom.1252;LC_MONETARY=English_United 
Kingdom.1252;LC_NUMERIC=C;LC_TIME=English_United Kingdom.1252

Search Path:
 .GlobalEnv, package:stats, package:graphics, package:grDevices, 
package:utils, package:datasets, package:methods, Autoloads, package:base