similar to: Stucked with as.numeric function

Hi List, I''m trying to get my ListCtrl to work. Currently I''ve managed to fill my ListCtrl with items, but I think it''s not the most beautiful way: class MyList < Wx::ListCtrl def initialize(parent, *args) super(parent, :style => Wx::LC_REPORT|LC_HRULES ) create_layout fill_list end def create_layout self.insert_column(0, "Name")

Hi, In some cases the number of arguments passed as ... must be determined inside a function, without evaluating the arguments themselves. I use the following construct: dotlength <- function(...) length(substitute(expression(...))) - 1L # Usage (returns 3): dotlength(1, 4, something = undefined) How can I define a method for length() which could be called directly on `...`? Or is it an

Dear R Core Team, I learnt approx. two years ago in this mailing list that one can use the following "trick" to get a (dotted pair)list of the ellipsis arguments inside a function: `substitute(...())` Now my problem is that I can not find any occurrence of this call within the R source - the most frequent solution there is `substitute(list(...))[-1L] ` I would like to know if: 1)

And the related: > f = function() stop(return("lol")) > f() [1] "lol" I have a feeling all of this is just return() performing correctly though. If there are already R CMD CHECK checks for this kind of thing (I wasnt sure but I'm hearing from others there may be/are) that may be (and/or may need to be) sufficient. ~G On Fri, Nov 20, 2020 at 3:27 PM D?nes T?th

Without having dug into the details, it could be that one could update the parser by making a 'return' a keyword and require it to be followed by a parenthesis that optionally contains an expression followed by end of statement (newline or semicolon). Such a "promotion" of the 'return' statement seems backward compatible and would end up throwing syntax errors on:

Benjamin, You happened to send a link which points to the OP's own package :) I think Jiefei would like to know how one can "officially" determine if an arbitrary ALTERP object belongs to a class that he owns. Regards, Denes On 10/19/20 10:22 AM, Benjamin Christoffersen wrote: > It seems as if you can you use the ALTREP macro as done in this > package:

Hi I have found a little problem with an R script. I am trying to merge some data and am finding something unusual going on. As shown below I am trying to assign (MatchedValues[Value2,Value]) to (ClusteredData[k,Value]) which are two separate dataframes. 1) By the following command you can see that the value im transferring is 481844.03 > MatchedValues[Value2,Value] [1] 481844.03 6618

Hi, For some reason do.call on anova fails if the models are named lmer objects. Consider the following example: library(lme4) models <- list( lmer(Reaction ~ Days + (1| Subject), sleepstudy), lmer(Reaction ~ Days + (Days | Subject), sleepstudy)) # # models is an unnamed list, do.call works (although with warning): do.call(anova, models) # # after labeling the models, do.call gives an

Dear R-Core Team, I found an unexpected behaviour in utils::removeSource (also present in r-devel as of today). --- # create a function which accepts NULL argument foo <- function(x, y) { if (is.null(y)) y <- "default foo" attr(x, "foo") <- y x } # create a function which utilizes 'foo' testSrc <- function() { x <- 1:3 x <- foo(x,

Thank Denes for the clarification, glad to see my package got one citation from my own question:) Also, thank Benjamin for sending many useful documents. Actually, the question is related to the SharedObject package that Benjamin has pointed to. I wanna avoid sharing an object that has already been shared, so I need to check whether an object is an ALTREP that is defined in my package. Since the

AFAIK there is no hashing utility in base R which can create hash digests of arbitrary R objects. However, as also described by Henrik Bengtsson in [1], we have tools::md5sum() which calculates MD5 hashes of files. Calculating hashes of in-memory objects is a very common task in several areas, as demonstrated by the popularity of the 'digest' package (~850.000 downloads/month). Upon

Hi Tim, I have also asked a similar question a couple of months ago, and someone else did the same recently, maybe on r-devel. We received no "official" response, but Deepayan Sarkar (R Core Team member) claimed that: " There is no documented reason for this to work (AFAIK), so again, I would guess this is a side-effect of the implementation, and not a API feature you should

I probably need to be more specific. What confuses me is not the use of substitute, but the parenthesis after the dots. It clearly works and I can make guesses as to why but it is definitely not obvious. The following function gives the same final result but I can understand what is happening. dots <- function (...) { exprs <- substitute(list(...)) as.list(exprs[-1]) } In the

I am looking for a way to save a plot (graphics contents) to a file after the plot has been calculated but before it has been rendered. More specifically, assume that I made a plot that took a very long time to produce, I would like to save this plot to a generic file that I can later, on a different machine, render to either PDF, PNG, SVG using the usual R graphics devices, without recalculating

I am looking for a way to save a plot (graphics contents) to a file after the plot has been calculated but before it has been rendered. More specifically, assume that I made a plot that took a very long time to produce, I would like to save this plot to a generic file that I can later, on a different machine, render to either PDF, PNG, SVG using the usual R graphics devices, without recalculating

Hi! I'm new on the list, so please, be patient with me! I have a problem for wich I can't find the answer in the FAQ. Until recently I was running a 16 PC-s network with SCO OpenServer 5.0.4 and Samba 1.9.16p11 on the server and mixed clients (Win 3.11 to Win 95 OSR2). The users on the network have access to a PUBLIC directory on they own user directories on the server without

On 20/11/2020 7:01 p.m., Ben Bolker wrote: > I may be unusual but I don't find these examples surprising at all/ > I don't think I would make these mistakes (maybe it's easier to make > that mistake if you're used to a language where 'return' is a keyword > rather than a function? > > My two cents would be that it would make more sense to (1) write

hi everyone, wondering if you could help me with a novice problem. I have a data frame called subjects with a height and weight variable and want to calculate a bmi variable from the two. i have tried: attach(subjects) bmi <- (weight)/((height/100)^2) but it comes up with the error: Warning messages: 1: In Ops.factor(height, 100) : / not meaningful for factors 2: In Ops.factor((weight),

Dear list, I ran into a strange behaviour of the pnbinom function - or maybe I just made a stupid mistake. First thing is that pnbinom seems to be very slow. The other - more interesting one - is that I get two different curves when I plot the estimated density and the density given by pnbinom. Shouldn't it be the same? This is only the case, I think, if I use the parameter size = 1. I

Hi all, I have a large number of text strings to search for enumerated items. However, I am receiving this error message even though I thought that I properly escaped the special character closed parenthesis: > Count<-str_count(text3,keywords) Error in stri_count_regex(string, pattern, opts_regex = opts(pattern)) : Syntax error in regexp pattern. (U_REGEX_RULE_SYNTAX) === Here is