similar to: Another code to drop factor levels

Displaying 20 results from an estimated 2000 matches similar to: "Another code to drop factor levels"

2018 Mar 24
1
Function 'factor' issues
I am trying once again. By just changing f <- match(xlevs[f], nlevs) to f <- match(xlevs, nlevs)[f] , function 'factor' in R devel could be made more consistent and back-compatible. Why not picking it? -------------------------------------------- On Sat, 25/11/17, Suharto Anggono Suharto Anggono <suharto_anggono at yahoo.com> wrote: Subject: Re: [Rd] Function
2017 Jun 07
1
Another way to count TRUE
To get the number of TRUE in logical vector 'x', tabulate(x, 1) can be used. Actually, it gives count of 1, but TRUE as integer is 1. Since R 3.4.0, it gives a correct answer, too, when the count is 2^31 or more.
2019 Feb 28
1
Using butt in same mount point that is used for relay
Thank you Pada tanggal Kam, 28 Feb 2019 10.01 mas wanto <wantom428 at gmail.com menulis: > Sam broadcaster and fallback mount > > Pada tanggal Kam, 28 Feb 2019 09.58 Leonardo Oliveira Ortiz < > leonardo.ortiz at marisolsa.com menulis: > >> Hello. >> >> >> >> We are using icecast to relay a radio station on local network and I have >> a
2019 Feb 28
2
Using butt in same mount point that is used for relay
Hello. We are using icecast to relay a radio station on local network and I have a question: There is a way to send streaming from a mic (with butt) using same mount point that we are using for relay? Or some workaround for it like using fallback mount point? Azuracast can do it but the software have some bugs (in general usage) and I need a more fast solution for now.... Best regards.
2016 Sep 26
2
Undocumented 'use.names' argument to c()
By "an argument named 'use.names' is included for concatenation", I meant something like this, that someone might try. > c(as.Date("2016-01-01"), use.names=FALSE) use.names "2016-01-01" "1970-01-01" See, 'use.names' is in the output. That's precisely because 'c.Date' doesn't have 'use.names', so
2019 May 30
2
stopifnot
Here is a patch to function 'stopifnot' that adds 'evaluated' argument and makes 'exprs' argument in 'stopifnot' like 'exprs' argument in 'withAutoprint'. --- stop.R 2019-05-30 14:01:15.282197286 +0000 +++ stop_new.R 2019-05-30 14:01:51.372187466 +0000 @@ -31,7 +31,7 @@ .Internal(stop(call., .makeMessage(..., domain = domain))) }
2017 Nov 04
1
ans[nas] <- NA in 'ifelse' (was: ifelse() woes ... can we agree on a ifelse2() ?)
Removal of ans[nas] <- NA from the code of function 'ifelse' in R is not committed (yet). Why? -------------------------------------------- On Mon, 28/11/16, Martin Maechler <maechler at stat.math.ethz.ch> wrote: Subject: Re: [Rd] ifelse() woes ... can we agree on a ifelse2() ? Cc: R-devel at r-project.org, maechler at stat.math.ethz.ch Date: Monday, 28 November, 2016, 10:00
2012 Dec 06
2
factor(x, exclude=y) if x is a factor
I found this part in the documentation of 'factor'. 'factor(x, exclude=NULL)' applied to a factor is a no-operation unless there are unused levels: in that case, a factor with the reduced level set is returned. If 'exclude' is used it should also be a factor with the same level set as 'x' or a set of codes for the levels to be excluded.
2017 May 18
2
stopifnot() does not stop at first non-TRUE argument
>From an example in http://www.uni-muenster.de/ZIV.BennoSueselbeck/s-html/helpfiles/nargs.html , number of arguments in '...' can be obtained by (function(...)nargs())(...) . I now realize that sys.call() doesn't expand '...' when the function is called with '...'. It just returns the call as is. If 'stopifnot' uses sys.call() instead of match.call() , the
2017 Aug 19
1
Issues of R_pretty in src/appl/pretty.c
Yes, they work now. I mentioned them partly because the commit description said overflow for large n and partly to be considered for regression tests. -------------------------------------------- On Sat, 19/8/17, Martin Maechler <maechler at stat.math.ethz.ch> wrote: Subject: Re: [Rd] Issues of R_pretty in src/appl/pretty.c Cc: r-devel at r-project.org Date: Saturday, 19 August, 2017,
2017 Aug 18
1
Issues of R_pretty in src/appl/pretty.c
Examples similar to pretty(c(-1,1)*1e300, n = 1e9, min.n = 1) with smaller 'n': pretty(c(-1,1)*1e304, n = 1e5, min.n = 1) pretty(c(-1,1)*1e306, n = 1e3, min.n = 1) A report on 'pretty' when working with integers, similar to what led to change of 'seq' fuzz, is https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=15137 -------------------------------------------- On Tue,
2017 Aug 11
2
Issues of R_pretty in src/appl/pretty.c
See https://stat.ethz.ch/pipermail/r-devel/2017-August/074746.html for the origin of the example here. That pretty(c(-1,1)*1e300, n = 1e9, min.n = 1) gave 20 intervals, far from 1e9, but pretty(c(-1,1)*1e300, n = 1e6, min.n = 1) gave 1000000 intervals (on a machine), made me trace through the code to function 'R_pretty' in https://svn.r-project.org/R/trunk/src/appl/pretty.c . *lo is
2016 Aug 11
2
table(exclude = NULL) always includes NA
I stand corrected. The part "If set to 'NULL', it implies 'useNA="always"'." is even in the documentation in R 2.8.0. It was my fault not to check carefully. I wonder, why "always" was chosen for 'useNA' for exclude = NULL. Why exclude = NULL is so special? What about another 'exclude' of length zero, like character(0) (not c(),
2017 Oct 15
2
Function 'factor' issues
In R devel, function 'factor' has been changed, allowing and merging duplicated 'labels'. Issue 1: Handling of specified 'labels' without duplicates is slower than before. Example: x <- rep(1:26, 40000) system.time(factor(x, levels=1:26, labels=letters)) Function 'factor' is already rather slow because of conversion to character. Please don't add slowdown.
2019 Mar 05
2
stopifnot
Another possible shortcut definition: assert <- function(exprs) do.call("stopifnot", list(exprs = substitute(exprs), local = parent.frame())) After thinking again, I propose to use ??? ? ? stop(simpleError(msg, call = if(p <- sys.parent()) sys.call(p))) - It seems that the call is the call of the frame where stopifnot(...) is evaluated. Because that is the correct context, I
2016 Sep 09
2
R-intro: function 'stderr' and 'sd'
In "An Introduction to R" Version 3.3.1, in "4.2 The function tapply() and ragged arrays", after stderr <- function(x) sqrt(var(x)/length(x)) , there is a note in brackets: Writing functions will be considered later in [Writing your own functions], and in this case was unnecessary as R also has a builtin function sd(). The part "in this case was unnecessary as R also
2016 Aug 14
2
table(exclude = NULL) always includes NA
useNA <- if (missing(useNA) && !missing(exclude) && !(NA %in% exclude)) "ifany" An example where it change 'table' result for non-factor input, from https://stat.ethz.ch/pipermail/r-help/2005-April/069053.html : x <- c(1,2,3,3,NA) table(as.integer(x), exclude=NaN) I bring the example up, in case that the change in result is not intended.
2017 Sep 18
2
NEWS item about PR#17284
Previous mentions: - https://stat.ethz.ch/pipermail/r-devel/2017-July/074723.html - https://stat.ethz.ch/pipermail/r-devel/2017-August/074737.html The NEWS item corresponding to PR#17284 is in "CHANGES in R-devel". However, fix for PR#17284 is already included in R 3.4.2 beta.
2019 Feb 18
1
Extract.data.frame.Rd about $.data.frame
The statement in R devel: There is no \code{data.frame} method for \code{$}, so \code{x$name} uses the default method which treats \code{x} as a list (with no partial matching of column names). The replacement method (for \code{$}) checks \code{value} for the correct number of rows, and replicates it if necessary. The added "(with no partial matching of column names)" is wrong.
2008 Jul 03
1
subset function within a function
Hi, I am using this subset statement and it works outside a function. LIS[[i]]<- lapply(LI, subset, select=cov[[i]]) However, wrapped inside a function this statement produces the same values for every LIS[[1]] which is only the first subset of LI. Does anyone know why is not working correctly inside a function? ff = factor(covariate) nLev <- nlevels(ff) cov <-