>>>>> "BDR" == Prof Brian Ripley <[EMAIL PROTECTED]>
>>>>> on Mon, 19 Mar 2007 13:37:15 +0000 (GMT) writes:
BDR> On Mon, 19 Mar 2007, Martin Maechler wrote:
>>>>>>> "Duncan" == Duncan Murdoch <[EMAIL PROTECTED]>
>>>>>>> on Mon, 19 Mar 2007 09:01:39 -0400 writes:
>>
Duncan> On 3/19/2007 6:48 AM, Martin Maechler wrote:
>> >>>>>>> "BDR" == Prof Brian Ripley <[EMAIL PROTECTED]>
>> >>>>>>> on Sun, 18 Mar 2007 06:51:58 +0000 (GMT) writes:
>> >>
BDR> On Sat, 17 Mar 2007, Spencer Graves wrote:
>> >> >> Hi, All:
>> >> >> Attached please find a symmetric, indefinite matrix for which
>> >> >> 'eigen(...)$vectors' included NAs:
>> >> >>> load("eigenBug.Rdata")
>> >> >>> sum(is.na(eigen(eigenBug)$vectors))
>> >> >> [1] 5670
>> >> >>> sessioninfo()
>> >> >> Error: could not find function "sessioninfo"
>> >> >>> sessionInfo()
>> >> >> R version 2.4.1 (2006-12-18)
>> >> >> 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" [7]
>> >> >> "base"
>> >> >> Using EISPACK does NOT return NAs: > sum(is.na(eigen(eigenBug,
>> >> >> EISPACK=TRUE)$vectors))
>> >> >> [1] 0
>> >> >>
>> >> >>
>> >> >> I traced the problem to the following line in 'eigen':
>> >> >> z <- if (!complex.x)
>> >> >> .Call("La_rs", x, only.values, PACKAGE = "base")
>> >> >>
>> >> >>
>> >> >> Comments?
>> >>
BDR> Nothing appeared as an attachment.
>> >>
>> >> it was a zip file which is not among the allowed ones
>> >> (.tar.gz / *.tgz would work).
>> >>
>> >> Spencer has also contacted me in private,
>> >> so you now can use something like :
>> >>
>> >> F <- tempfile()
>> >> download.file("ftp://stat.ethz.ch/U/maechler/R/eigenBug.Rdata";, F)
>> >> load(F)
>>
Duncan> This is unrelated to Spencer's problem, but this
Duncan> sequence failed for me.
>>
Duncan> By default it will treat the file as a text file,
Duncan> and convert EOL markers for Windows. Adding
Duncan> "mode='wb'" to the download.file() call is necessary.
>>
>> ok; Thank you, Duncan.
>>
>> {For me, that's yet another reason why I think it would be ``nice''
>> if both load() and source() would work with general
>> connections the same way as read.table(), and I could just say
>>
>> load("ftp://stat.ethz.ch/U/maechler/R/eigenBug.Rdata";)
>> }
BDR> The help page for load() does have an example of using a url()
connection
BDR> here, and that works in this example on Windows, as does
BDR> load(url("ftp://stat.ethz.ch/U/maechler/R/eigenBug.Rdata";))
BDR> Not so hard, surely?
definitely not. Here, I've confused load() and source()
and just last week in a course I gave I had wished that I could
use
source(url(....))
BDR> (The reason load() is different is that it can transparently handle
compressed files, unlike read.table.)
yes, indeed; I had forgotten about the reason.
Martin
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