similar to: format.char() speedup

Displaying 20 results from an estimated 1000 matches similar to: "format.char() speedup"

2000 Jan 12
0
inconsistencies between formatC(), format() and format.char()
Dear R-Developers, Just a note: there are some inconsistencies between formatC(), format() and format.char() and cross calling between these functions. On the one hand > cat(format('{"}'), "\n") {\"} > cat(format.char('{"}'), "\n") {\"} is by default format.char(, flag="-") and thus by default calling format() >
2000 Feb 11
1
new chron problems in RW0990
Dear all, In RW0901 I could > dates("01/01/2000") [1] 01/01/100 where only the printing was wrong, but the double numeric representation of the chron object was calculated correctly but now in RW0990 > dates("01/01/2000") Error in fun(yy, ...) : must be 2-digit (numeric) year specification and also the followig doesn't help > dates("01/01/2000",
2000 Feb 11
1
astonishing memory phenomenon
I have a question concerning memory. I understood that R takes a fixed amount of memory at startup (which I can influence with --vsize --nsize) and that gc() shows the memory still free of the total memory reserved for R. However, if I create a long vector of character data, gc() only seem to reflect the space needed for a vector of pointers to char, the space used for the character data itself
2000 Jan 26
1
data.frame[1,1]<- differs from data.frame[[1]][1]<- (PR#403)
I observed the following difference: > ddd <- data.frame(a=1:3, b=1:3) # assignment of 'X' silently ignored > ddd[1,1] <- 'X' > is.factor(ddd[[1]]) [1] FALSE > ddd a b 1 1 1 2 2 2 3 3 3 # assignment of 'X' not ignored > ddd[[1]][1] <- 'X' > is.factor(ddd[[1]]) [1] TRUE > ddd a b 1 X 1 2 2 2 3 3 3 Regards > version
1999 Dec 20
1
Manual: writing R Extensions (PR#380)
-- Happy holidays! -- Dear R Development Core Team, I want to thank you *very much* for the new "Writing R Extensions" manual published with RW0.901 and hope this is the right place to report some possible typos. page 17, example given in the middle of the page, I think it should read REAL(version) = 3.0; ^^^^^^^ page 23, second example, I think the parameter definition
1999 Dec 23
1
data.frame(I(matrix)) ? (PR#388)
I observe dificulties with using data.frame(I(matrix)) > mat <- matrix(letters, 2, 2) > dimnames(mat) <- list(c(1:2), c("x","y")) > mat x y 1 "a" "c" 2 "b" "d" > dd <- data.frame(I(mat)) > ddd I.mat..x I.mat..y 1 a a 2 b b 3 c c doesn't look too bad, but, has
2000 Jan 04
0
formatC (bug and fix) (PR#394)
OK: > formatC(as.double(c(1,0,NA))) [1] "1" "0" "NA" NOT OK: > formatC(as.integer(c(1,0,NA))) [1] "0" "1072693248" "NA" > formatC(as.integer(c(0,1,NA))) [1] "0" "0" "NA" BUG TRACED TO R-code of formatC() where x[!Ok] <- 0 unintendedly changes the storage.mode of x to
2000 Mar 08
2
possible BUG with as.data.frame() and/or [.data.frame
Here is a possible BUG with as.data.frame() and/or [.data.frame which broke Michael Lapsleys RODBC-Code. Can anyone confirm it is a bug or a 'feature' of the prototype? tablename <- "abc" a <- as.data.frame(cbind("abc", 1:3)) b <- as.data.frame(cbind(tablename, 1:3)) # ok > a V1 V2 1 abc 1 2 abc 2 3 abc 3 # missing column name > b tablename 1
1999 Dec 22
0
as.matrix.data.frame() modifies content of character columns (PR#386)
If you have the following dataframe: > x <- data.frame(x=I(rep('"', 3))) then > as.matrix(x)[1,1] == x[1,1] [1] FALSE which seems to be WRONG to me. Also I don't understand > x x 1 \\\" 2 \\\" 3 \\\" Details ======= As expected > unclass(x) $x [1] "\"" "\"" "\"" attr(,"class") [1]
2000 Jan 31
1
long character data
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="") # or directly paste(1:10000, collapse="abc") Am I violating any max(nchar(character())) or is this a bug? Regards Jens Oehlschl?gel-Akiyoshi
1999 Oct 04
1
SQL-Interface
Can anyone give advice how to interactively exchange data between R and SQL-Databases like DB2, ORACLE, MS-SQL-Server ? If the answer is: 'currently not', this would be information for me as well. I will summarize to the list. Best regards -- Dr. Jens Oehlschl?gel-Akiyoshi MD FACTORY GmbH Bayerstrasse 21 80335 M?nchen Tel.: 089 545 28-27 Fax.: 089 545 28-10 http://www.mdfactory.de
1999 Dec 21
3
BUG in format()? (PR#383)
In RW0.651 and RW0.901, I discovered some unexpected behaviour when I used as.matrix.data.frame() > matrix('"', 2, 2) [,1] [,2] [1,] "\"" "\"" [2,] "\"" "\"" > unclass(as.data.frame(matrix('"', 2, 2))) $V1 [1] "\"" "\"" $V2 [1] "\"" "\""
1999 Dec 20
1
BUG?
Hi, under RW0.651 and RW0.091 I found > x <- data.frame(char=I(letters[1:3]), num=1:3, log=c(TRUE, FALSE, NA), fak=factor(letters[24:26])) > x char num log fak 1 a 1 TRUE x 2 b 2 FALSE y 3 c 3 NA z > > x[1,1] <- 'a' > x[1,1] [1] "1" > > x$char[1] <- 'a' > x$char[1] [1] "a" > >
2000 Jan 26
1
paste with a matrix
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" "3 c" > paste.matrix <- function(mtext, sep=" ", collapse=NULL){ + rcode <- paste( +
2000 Feb 28
1
mapping of colornames into hsv?
I couldn't find this in online help or the archives: Is there any R function or object giving the mapping of the colornames as given by colors() into the hsv() model? Regards -- Dr. Jens Oehlschl?gel-Akiyoshi MD FACTORY GmbH Bayerstrasse 21 80335 M?nchen Tel.: 089 545 28-27 Fax.: 089 545 28-10 http://www.mdfactory.de
2000 Feb 28
1
mapping of colornames into hsv?
I couldn't find this in online help or the archives: Is there any R function or object giving the mapping of the colornames as given by colors() into the hsv() model? Regards -- Dr. Jens Oehlschl?gel-Akiyoshi MD FACTORY GmbH Bayerstrasse 21 80335 M?nchen Tel.: 089 545 28-27 Fax.: 089 545 28-10 http://www.mdfactory.de
1999 Oct 25
1
Summary: SQL-Interface
Some days ago I asked for general methods to access SQL-Databases. Thanks to: Terry Westley [twestley at buffalo.veridian.com], partha_bagchi at hgsi.com, F.Tusell [etptupaf at bs.ehu.es], Michael Lapsley [mlapsley at ndirect.co.uk], Robert Gentleman [rgentlem at jimmy.harvard.edu], Torsten Hothorn [hothorn at statistik.uni-dortmund.de] Several solutions were suggested: (1) using Michael
1999 Oct 18
2
Solving problems with read.fwf(), perl under WinNT (was: Re: Using metric scaling)
Some days ago a problem with perl under WinNT was reported, which lead to > > t1 <- read.fwf("d:/maj/consulting/MarkStevens/matrix.txt", width=c(4, 22, > rep(7, 8))) > Error: "scan" can't open file I installed perl from the WindowsNt Recource Kit CD (Sept. 98) and encountered the same problem: Scan couldn't open the file - because perl did not produce
2000 Jan 12
3
functions for flat file import/export + utilities
Dear R-Developers, please find attached a set of drafted functions for flat file import and export, partially extending existing functions, partially completely written as new code. I thought you might be interested in those functions and the accompanying utilities for padding and trimming. Main features are - supports several formats, i.e. fixed width and CSV (with one exception) - supports
1999 Dec 06
1
No subject
Hi, can anyone help with two questions concerning persp? (1) Is there a function in R to project points onto a persp() plot, as is in S+ (perspp() I think) ? (2) How can I label and tickmark axes x,y and z in a persp plot? (I am still using RW065) Thanks for any help -- Dr. Jens Oehlschl?gel-Akiyoshi MD FACTORY GmbH Bayerstrasse 21 80335 M?nchen Tel.: 089 545 28-27 Fax.: 089 545 28-10