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Hi, When trying to generate very long strings, my R hangs without any error message, even if given much memory. # e.g. x <- character(10) for (i in 1:10) x[i] <- paste(1:1000, collapse="abc") paste(x, collapse...

Xiaobo, You indeed need external 'zip' and 'unzip' utlities in the path, citing from ffsave's help: "using an external zip utility, e.g. for windows in Rtools on [http://www.murdoch-sutherland.com/Rtools/]". Please note that the mentioned...

Hi, under RW0.651 and RW0.091 I found > x <- data.frame(char=I(letters[1:3]), num=1:3, log=c(TRUE, FALSE, NA), fak=factor(letters[24:26])) > x char num log fak 1 a 1 TRUE x...

I try to create a big treelike list structure using the RDefines/RInternal macros. The tree carries information at each node (attribute list) and at each leaf (vector). My understanding is that for each node I add to the binary...

Hello, I have been struggling for quite some time to find a solution for the following problem. I have a data frame which is organized by block and trial. Each trial is represented across several rows in this data frame...

Kurt Hornik wrote > Note that currently, chron/dates only supports formats like "m/d/y" or > "mdy" where all three signify (2-digit) abbreviations However, the older version of chron DID allow creating CORRECT chron objects with mm/dd/yyyy...

On Thu, 27 Sep 2001, Baju Indradjaja wrote: > > Hello, > I am a new member since a few months ago. I have a simple question: > How I make a filled contour ? I am sorry if this question already > asked before. Perhaps...

Dear all, Has someone implemented in R (or any other language) Knol DL, ten Berge JMF. Least-squares approximation of an improper correlation matrix by a proper one. Psychometrika, 1989, 54, 53-61. or any other similar algorithm? Best regards...

I observe if > char <- letters[1:2] > fac <- factor(char) > dd <- data.frame(char=I(char), fac=fac) then > dd[,"char"] <- char > dd[,"char"] [1] a b Levels: a b and > dd$char <- char > dd$char [1] "a" "b" are...

Hi, Is there any official way to determine the colClasses of a data.frame? Why has POSIXct such a strange class structure? Why is colClasses "ordered" not allowed (and doesn't work)? Background ========== I am writing a chunked csv reader...

Hi, below is a function which pastes a matrix, but uses parsing (deparse(substitute()) and eval()). Does anyone know a more standard solution to pasting a matrix? Best Jens > paste.matrix(dd, sep=" ", collapse=NULL) [1] "1 a" "2 b...

I just discovered that it is not possible to read in data with scan() and to have no na.strings at all scan(na.strings=NULL) gives an error message "invalid na.strings value". Furthermore it is not possible to...

On 19 Sep 2000, Peter Dalgaard BSA wrote: > Jens Schmidt <schmidtj at Rcs1.urz.tu-dresden.de> writes: > > > Is it possible creating line plots with symbols so, that the solid line > > doesn't appear in the symbol background. When I...

Some days ago I asked for help because make.socket() failed under WinNT (RW-0.64.2). Thanks to Brian D. Ripley and Thomas Lumley, I learned that there was a problem with pre-compiler flags, and that RW-0...

Hi, I'm not yet familar with GLM and still learning. How can I perform a BNL (to estimate LDp values) with matrixes like this (N indicates the observed objects): data from: Kerr D, Meador J. 1996. "Modeling Dose Response...

Can someone point me to literature and/or R software to solve the following problem: Assume n true scores t measured as x with uncorrelated errors e , i.e. x = t + e and assume each true score to a have...

Hi, I know there have been some discussions on that topic. all their solutions failed in my case... My problem is that I have a dataframe with many zeros. but while plotting they are not useful. so I want to...

Before sending to r-bugs, I ask here: If > char <- letters[1:2] > fac <- factor(char) > dd <- data.frame(char=I(char), fac=fac) then > dd[,"char"] <- char > dd[,"char"] [1] a b Levels: a b and > dd$char <- char...

Xiaobo.Gu, > Can the plenty of analytical functions provided by base R and contributed packages be called with ff objects as parameters directly, or do we have to write special version of the functions for ff objects? If it is...

Full_Name: Jens Lund Version: Version 1.7.0 (2003-04-16) OS: Win NT 4.0 SP 6 Submission from: (NULL) (193.3.225.210) As the T distribution is symmetrical around 0 qt(0.5,df) should return...