roblem in R.
BTW, the help for setTimeLimit() says that the time limit check happens
frequently during `Sys.sleep()`, but that doesn't appear to be true.
I've tried a variation on the code above which sleeps for 20 seconds,
even with a ti
tions when you installed R, you may or may not
actually have static copies of them installed. The help server in R may
generate them on the fly.
Duncan Murdoch
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e PROTECT calls, but it's not really that different.
Duncan Murdoch
On 2025-04-11 11:57 a.m., Paul McQuesten wrote:
For a long-term horizon, would it help R developers to use a naming
convention?
Perhaps, varName_PROT, or the inverse varName_UNPROT?
Eventually, teach some linter about th
ly, but it
would be really helpful in debugging.
Duncan Murdoch
On 2025-04-11 6:05 a.m., Suharto Anggono Suharto Anggono via R-devel wrote:
On second thought, I wonder if the caching in my changed 'StringFromLogical'
in my previous message is safe. While 'ans' in the C
a non-standard format would be.
I just did a check, and got this NOTE:
The Date field is not in ISO 8601 -mm-dd format.
So I think the docs are correct.
Duncan Murdoch
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help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
NULL
NULL
Warning message:
"foo" is not a graphical parameter
plot.new(); suppressWarnings({ points(0, 0, foo = TRUE) })
NULL
NULL
In R.
urrently I don't use svn for anything but the R sources, but I suspect
that will continue for some time...
Duncan Murdoch
On 2025-03-24 4:05 p.m., Tim Taylor wrote:
FWIW, on the command line I’m a happy 'delta' user for a quick side by
side comparison (https://github.com
eep within the action script. A
simpler approach would be to fork my fork and set the default value for
"demote" to whatever you want, then install your own fork during the
Github action.
Comments are welcome.
Duncan Murdoch
On 2025-03-31 1:48 p.m., Ben Bolker wrote:
On 2025-03-
is not a
real function. It has special meaning in formulas and should only be
used there. Use Strata() outside of a formula.")
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call entry points which might terminate
The message being matched has to appear all on one line, but multiple
patterns can be given on separate lines. Embedded newlines are not
allowed. A simple fixed grep is used to match it to the check log.
See the ?rcmdcheck help page for more details.
Dunc
On 2025-03-31 4:50 p.m., Duncan Murdoch wrote:
Just for fun I forked rcmdcheck and added arguments to it to allow
particular messages to be changed in severity.
For example, if the WARNING message says something which matches the
regexp "Compiled code should not call entry points which
ted on CRAN and
locally by suppressing stdout/err. But that would be adversarial and I
would like to adhere to the intent of the check.
I think Tim was suggesting that you modify your Github action to ignore
this particular warning. The warning would still appear, but it
wouldn't cause a
which should be set to "error", and "upload-result", which
should be set to "true". So this is the easy part.
Then examine those results, ignore the warnings you don't care about,
and trigger on warnings you do care about. I have never written a
github acti
imilar
to _R_CHECK_CRAN_INCOMING_ to skip this check primarily for GitHub
Actions and CI?
The "Compiled code should not call entry points which might terminate R"
isn't a new warning. I think the last change to it was made in 2022.
Maybe your code, or code in one of the libraries you use, has
I think email to the maintainer is likely the only choice. The
maintainer is "CRAN Team ".
Duncan Murdoch
On 2025-03-25 6:58 p.m., Ben Bolker wrote:
Maybe https://github.com/duncantl/RJSONIO ?
(That page also points to https://omegahat.org/RJSONIO, which is now
defunct ...)
On
it is cross-platform.
Based just on that comparison page, I'd probably choose DiffMerge or
Diffuse, but I imagine some of the others can match them.
Duncan Murdoch
On 2025-03-25 6:53 a.m., Serguei Sokol via R-devel wrote:
Le 24/03/2025 à 20:28, J C Nash a écrit :
For Linux users, mel
maybe submit
a patch for that, too.
Duncan Murdoch
On 2025-03-25 2:12 a.m., Michael Chirico wrote:
Consider:
foo <- function(x, y, ...) {
UseMethod("foo")
}
foo.default <- function(x, y = 0, ...) {
cat(sprintf("%s: x=%s, y=%s\n", as.character(ma
27;ve been using it for a very long time (20 years or more, I
think), and I suspect there are very good open source competitors out
there now (and may have been for all the time I've been using BC).
Suggestions?
Duncan Murdoch
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ed for R to add another environment
variable.
BTW, as far as I can see current R-devel doesn't issue an error, it just
issues warnings about two issues:
- the package is downloading crates
- the rustc compiler doesn't report a version number
Duncan Murdoch
I'm not
the repository where you want to put your package to put that
option or environment variable in place, and there's no longer a problem.
Duncan Murdoch
Ideally, the check can remain, but scoped appropriately.
On Sun, Mar 2, 2025 at 6:49 AM Duncan Murdoch <mailto:murdoch.dun...@gmail
versions there may be different.
Those are some of the issues that Simon was alluding to.
Duncan Murdoch
On 2025-03-02 5:45 a.m., Mossa Merhi Reimert via R-devel wrote:
Dear Simon Urbanek,
There has been very little engagement with the issue I referred to. If it was
decided that this “check
Sorry, that misses a step. You should try
R CMD Sweave --pdf displaylist.Rnw
which runs it through Sweave to make displaylist.tex and then tries to
run texi2pdf() on that.
Duncan Murdoch
On 2025-01-29 3:00 p.m., Duncan Murdoch wrote:
The builder runs tools::texi2pdf() on the vignettes
The builder runs tools::texi2pdf() on the vignettes. Does that give the
same error for you? Do earlier revisions work?
Duncan Murdoch
On 2025-01-29 2:20 p.m., Avraham Adler wrote:
I see there have been a number of tweaks to the document build
recently (87650, 87654, 87658, 97660, 97661, etc
roject.org (rev 608, same day).
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error.
My own feeling is that any use of "=" as an assignment operator is too much.
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On 2025-01-02 11:20 a.m., Duncan Murdoch wrote:
On 2025-01-02 9:04 a.m., Norbert Kuder wrote:
Hello all,
I am running R version 4.4.2 (2024-10-31 ucrt) on Windows 10 x64, and
noticed something that might be a minor bug (or at least inconsistent code)
in the stats/arima.R package.
I have found
], Delta, kappa, SSinit)
if(ncxreg > 0) x <- x - xreg %*% coef[narma + (1L:ncxreg)]
arimaSS(x, mod)
yet the log shows no recent changes. I'm not sure what's going on.
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BTW, this is discussed in section 3.2.1 of "The R Language Definition".
Duncan Murdoch
On 2024-12-02 10:56 a.m., Mikael Jagan wrote:
I wonder if there is room for improvement here:
> str2lang("if (a) b1else b0")
if (a) b1 else b0
> str2
when they are complete, it
will evaluate this and return b1 or NULL.
Putting the full expression in braces solves the issue, because this is
clearly incomplete:
{ if (a) b1
Duncan Murdoch
On 2024-12-02 10:56 a.m., Mikael Jagan wrote:
I wonder if there is room for improvement here:
ax to have side effects. Surely you or they
should be the ones to run the test across all of CRAN?
Duncan Murdoch
On 2024-10-25 6:35 a.m., Ivan Krylov via R-devel wrote:
On Thu, 24 Oct 2024 13:23:56 -0400
Toby Hocking wrote:
The patch you are proposing to base R is
https://github.com/Rdata
On 2024-08-29 3:34 p.m., Gábor Csárdi wrote:
On Thu, Aug 29, 2024 at 12:12 AM Duncan Murdoch
wrote:
[...]
I think the reason is simplicity. The build process can add, delete or
modify files. You wouldn't want that to happen on the original source
files, so R copies the files to a temp
.
Having an R package that needs so much data that you can't fit two
copies of it on your disk is a really unusual situation. I think it
will have to be up to you to fix it (by increasing your temp space, or
decreasing the size of some of those files, or something else).
) ~ datavector +
strata(inst), data=lung)
if a user had a vector named datavector.
Duncan Murdoch
Terry
On 8/27/24 03:38, peter dalgaard wrote:
In my view, that's just plain wrong, because strata() is not a function but a
special operator in a model formula. Wouldn't i
On 2024-08-26 12:34 p.m., Duncan Murdoch wrote:
On 2024-08-26 10:42 a.m., Therneau, Terry M., Ph.D. via R-devel wrote:
The survival package makes significant use of the "specials" argument of
terms(), before
calling model.frame; it is part of nearly every modeling function. The reaso
less
likely to show up in another package, but it's old code.
This isn't on CRAN yet, so I'd be interested in hearing about problems
with this approach, or better solutions.
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rary() or require()")
in functions that could trigger the problems.
Duncan Murdoch
Would there be a tolerably easy way to make the fit fail loudly on
`survival::strata(…)` rather than return the wrong result?
On Aug 26, 2024, at 7:42 AM, Therneau, Terry M., Ph.D. via R-devel
wrot
Thanks! I think your suggested additions to the docs are perfect.
Duncan Murdoch
On 2024-08-09 5:01 a.m., Tomas Kalibera wrote:
On 8/1/24 20:55, Duncan Murdoch wrote:
Thanks Tomas. Do note that my original post also mentioned a bug or
doc error in the PCRE docs for this regexp:
- perl
hould only match the literal string "{,5}").
Duncan
On 2024-08-01 6:49 a.m., Tomas Kalibera wrote:
On 7/29/24 09:37, Ivan Krylov via R-devel wrote:
В Sun, 28 Jul 2024 20:02:21 -0400
Duncan Murdoch пишет:
gsub("^([0-9]{,5}).*","\\1","123456789
"123456789", because "{,5}" is documented to not be a
quantifier, so it should only match the literal string "{,5}").
- Some regexp engines (including Perl and Awk) document that "12345"
is correct.
Is any of this worth fixing?
Duncan Murdoch
x27;t single step through a pipe (as far as I know), but with that
modification, you can see what you've got at any point.
Duncan Murdoch
On 2024-06-29 6:57 p.m., Spencer Graves wrote:
Hi, Duncan:
On 6/29/24 17:24, Duncan Murdoch wrote:
Yes. I'm not yet facile with "|
rds:
x |> f(a = 1) |> g(b = 2)
is just
g(f(x, a = 1), b = 2)
This isn't quite true of the magrittr pipe, but it is exactly true of
the base pipe.
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nd
to it, but the 0xn matrix is unchanged for n > 0.
Clearly from the help this is intentional, but is it desirable?
Wouldn't it make more sense for NULL to be ignored by rbind() and cbind()?
Duncan Murdoch
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better, the one that comes with the development version of R.
Duncan Murdoch
As a more comprehensive example of constructing an R call in C code and
evaluating, consider the following fragment of printAttributes in
src/main/print.c.
/* Need to construct a call to
print(CAR(a
0x102d22fa0
run_REngineRmainloop + 260
14 R 0x102d1a64c -[REngine runREPL]
+ 124
15 R 0x102d0dd90 main + 588
16 dyld 0x188fae0e0 start + 2360
Duncan Murdoch
__
n you should
submit a patch containing it to bugs.r-project.org. Based on c.Date,
here's a first attempt:
c.hexmode <- function(...) as.hexmode(c(unlist(lapply(list(...),
function(e) unclass(as.hexmode(e))
If you want this to be incorporated into R, y
I've just upgraded to an M3 Mac laptop, and I'm working through getting
the right configure settings to build R.
The Installation and Administration manual says to have this in config.site:
FFLAGS="-g -O2 -mmacos-version-min=11.0"
FCFLAGS="-g -O2 -mmacos-version-min=11.0"
but those give an err
A criticism of your suggestion is that it is not backwards compatible.
Does that matter? I don't know, but probably not. The X11 version of
the viewer does what you suggest.
Duncan Murdoch
On 2024-05-15 2:20 a.m., Iago Giné Vázquez wrote:
About the decisions:
Actually, the sam
cess to Windows), but I could help with the design.
Duncan Murdoch
On 2024-05-14 5:25 a.m., Iago Giné Vázquez wrote:
Thanks again Duncan and Ivan,
I forward then the email to R-devel.
Summarizing, the dataedit options (in RGui preferences or RConsole) to
colouring the View output do not hav
put as Jing Hua:
Input filename.csv:
Gene,SNP,prot,log10p
YWHAE,13:62129097_C_T,1433E,7.35
YWHAE,4:72617557_T_TA,1433E,7.73
Output:
> read.csv("filename.csv")
Gene SNP prot log10p
1 YWHAE 13:62129097_C_T 1433 7.35
2 YWHAE 4:72617557_T_TA 1433 7.73
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onal <- Matrix::isDiagonal
instead of messing around with the user's search list, which may have
been intentionally set to include only one of those.
So I'd suggest changing the docs to say
"[library and require] check and update the list of currently attached
packages and do not reload a namespace which is already loaded. If a
package is already attached, no change will be made."
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Yes, definitely looks like a bug.
Are you able to submit it to bugs.r-project.org?
Duncan Murdoch
On 05/04/2024 8:15 a.m., June Choe wrote:
There seems to be a bug in out-of-bounds assignment of list objects to an
expression() vector. Tested on release and devel. (Many thanks to folks
over at
On 02/04/2024 8:50 a.m., Dirk Eddelbuettel wrote:
On 2 April 2024 at 07:37, Dirk Eddelbuettel wrote:
|
| On 2 April 2024 at 08:21, Duncan Murdoch wrote:
| | I have just added R-4-4-branch to the feeds. I think I've also fixed
| | the \I issue, so today's news includes a long l
I have just added R-4-4-branch to the feeds. I think I've also fixed
the \I issue, so today's news includes a long list of old changes.
Duncan Murdoch
On 16/03/2024 8:47 a.m., Duncan Murdoch wrote:
I have now put the files online at https://github.com/dmurdoch/diffnews
. It seeme
e development of the pipe operator: it was in magrittr
(and I think another package, but I forget the name) first, was widely
adopted, then a simpler version was brought into base R.
Duncan Murdoch
Le ven. 29 mars 2024 à 16:25, Duncan Murdoch <mailto:murdoch.dun...@gmail.com>> a écr
ithout needing to duplicate the rules.
If those functions could be made simple enough and bulletproof and were
widely adopted, maybe they'd be copied into one of the base packages,
but really the only need for that would be to support validation on
setting, rather than validation on
I have now put the files online at https://github.com/dmurdoch/diffnews
. It seemed like too much trouble to include the SVN history, so this
is just a copy of the current version of the files.
Duncan Murdoch
On 15/03/2024 12:04 p.m., Lluís Revilla wrote:
Hi!
Thanks for this service! It is
I
wrote it about 16 years ago).
Duncan Murdoch
On 15/03/2024 12:04 p.m., Lluís Revilla wrote:
Hi!
Thanks for this service! It is very helpful to know what is being developed.
I distribute the content to other venues and I noticed some times that the
updates are duplicated.
For example, the sentence
, but you could always write the code something like this:
if (Sys.getenv("RUN_SLOW_CHUNKS", 0)) {
... the slow code goes here ...
} else
cat("This chunk takes several hours to compute. If you want to run
it, set the environment variable RUN_SLOW_CHUNKS to
R/RandomSearch.R#L11-L12
I don't have any idea if this is intentional or not.
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7 9 SYMBOL TRUE x2
9 1 12 1 13 9 10exprFALSE
The expressions produced are the same, but the parse data is different.
Duncan Murdoch
On 04/03/2024 11:51 a.m., Bill Dunlap wrote:
Maybe someone has already suggested this, but if your functions accepted
st
the operands reversed when it sees that token.
Duncan Murdoch
On 02/03/2024 6:06 a.m., Adrian Dușa wrote:
That would have been an elegant solution, but it doesn't seem to work:
`->` <- `+`
1 -> 3 # expecting 4
Error in 3 <- 1 : invalid (do_set) left-hand side to assignment
I
On 01/03/2024 8:51 a.m., Dmitri Popavenko wrote:
On Fri, Mar 1, 2024 at 1:00 PM Duncan Murdoch <mailto:murdoch.dun...@gmail.com>> wrote:
...
I was thinking more of you doing something like
parse(text = "A -> B", keep.source = TRUE)
I forget what t
On 01/03/2024 5:25 a.m., Dmitri Popavenko wrote:
Dear Duncan,
On Fri, Mar 1, 2024 at 11:30 AM Duncan Murdoch <mailto:murdoch.dun...@gmail.com>> wrote:
...
If you parse it with srcrefs, you could look at the source. The parser
doesn't record whether it was A
wonder if there is any possibility whatsoever to signal the use of ->
instead of <-
If you parse it with srcrefs, you could look at the source. The parser
doesn't record whether it was A -> B or B <- A anywhere else.
Duncan Murdoch
__
On 20/02/2024 8:03 a.m., Duncan Murdoch wrote:
I noticed the following odd behaviour today:
exprs <- expression( mean(a), mean(b), { a }, { b } )
exprs[[1]] == exprs[[2]]
#> [1] FALSE
exprs[[3]] == exprs[[4]]
#> [1] TRUE
Does it make sense to anyone that the
tained in braces doesn't?
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here" to be the *only* way to limit tracing
to some copies of the function, and if "where" is omitted, trace()
should attempt to modify all copies?
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On 08/02/2024 7:58 p.m., Jiří Moravec wrote:
> This is a workaround, and could be the basis for a round.Date
improvement:
> date <- Sys.Date()
> as.Date(round(as.POSIXct(date), "years"))
> as.Date(round(as.POSIXct(Sys.Date() + 180), "years"))
This is a workaround, and could be the basis for a round.Date improvement:
date <- Sys.Date()
as.Date(round(as.POSIXct(date), "years"))
as.Date(round(as.POSIXct(Sys.Date() + 180), "years"))
Duncan Murdoch
On 08/02/2024 12:23 p.m., Henrik Bengtsson wrote:
Techni
}
And here's what I get when I run it on rgl:
dupnames("rgl")
name first dup
1 fns knitr.R:12 knitr.R:165
2 fns knitr.R:12 pkgdown.R:14
3 fns knitr.R:12shiny.R:8
Those are okay; the fns object is a temporary that is later removed in
each case.
Duncan Murd
On 07/02/2024 8:36 a.m., luke-tier...@uiowa.edu wrote:
On Tue, 6 Feb 2024, Duncan Murdoch wrote:
The SO post https://stackoverflow.com/q/77943180 tried to call
globalCallingHandlers() from a function, and it failed with the error message
"should not be called with handlers on the stack
)) {
cat("Duplicated names in ", basename(f), ":\n")
cat(paste(allnames[dups], collapse = ", "), "\n")
}
}
It could be made more fancy to report the locations of both the original
and the dup if you feel motivated.
Duncan Murdoch
On 06/02/2024 8:0
including non-global ones (like the one try() added in
the line above)?
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the check code isn't smart enough to follow every code path, so it gives
the note to warn you that you might have something wrong.
You still have the same issue with my workaround, but the check code
isn't smart enough to notice that.
Duncan Murdoch
H.
On 2/4/24 09:07, Duncan Mur
Hi John.
I don't think the 80 bit format was part of IEEE 754; I think it was an
Intel invention for the 8087 chip (which I believe preceded that
standard), and didn't make it into the standard.
The standard does talk about 64 bit and 128 bit floating point formats,
but not 80 bit
is that you have a function
object in your function which can't be called unconditionally. The
workaround doesn't create such an object.
Recognizing that your function never tries to call fun requires global
inspection of toto(), and most of the checks are based on local inspection.
I've just been reading
https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication, and it
states that putting userid:password in the URL is deprecated, but it
does make sense that R should protect users who still use that scheme.
Duncan Murdoch
On 01/02/2024 11:28 a.m., Xinyi
#x27;t know, but I think usually people would
want the behaviour of paste(readLines(f), collapse = "\n").
Duncan Murdoch
On Fri, Jan 26, 2024 at 2:05 PM luke-tierney--- via R-devel
wrote:
On Fri, 26 Jan 2024, Michael Chirico wrote:
I am curious why readLines() has a default (n=-1L)
g the last element."
That text has been unchanged in the help page for 13 years.
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I'm really confused. Steve's example wasn't a scalar x, it was a
vector. Your zapsmall() proposal wouldn't zap it to zero, and I don't
see why summary() would if it was using your proposal.
Duncan Murdoch
On 17/12/2023 8:43 a.m., Gregory R. Warnes wrote:
Isn’t
l. But that's a big
benefit for you if you are really interested in working with this kind
of thing.
Duncan Murdoch
On 13/12/2023 4:19 a.m., Iago Giné Vázquez wrote:
Dear all,
This is a request to get language objects more documented in the R Language Definition
document (CRAN version&l
*() functions to use only long names
doesn't make sense.
On the other hand, not modifying the executable name would make a lot of
sense, wouldn't it? I'm pretty sure all supported versions of Windows
can handle long filenames.
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o get it to work with the
ancient OpenGL 1.2 that rgl uses. I forget whether it was just hard or
actually impossible.
I am slowly working towards having rgl use newer OpenGL versions, but I
don't expect this to be done for quite a while.
Duncan Murdoch
Cheers,
Simon
Several Linux d
currently valid code:
grepl(1, "abc123")
It's not great style, but shouldn't generate an error.
Duncan Murdoch
At root, the problem is that R does not expose the regex compilation
routines like 'tre_regcomp', so from the R side we have to resort to
hacky approaches.
code that
catches the warning, but it will also include the context where it was
triggered.
Duncan Murdoch
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vice" = 1)
}
This does the dev.set even if there's only one device so it can return
the resulting device number.
Duncan Murdoch
Trevor
On Mon, Oct 2, 2023 at 5:25 PM Duncan Murdoch <mailto:murdoch.dun...@gmail.com>> wrote:
Thanks! However, isn't length(dev.l
Thanks! However, isn't length(dev.list()) == 0 when there are no
devices? That's what I'm seeing on MacOS.
Duncan Murdoch
On 02/10/2023 4:21 p.m., Trevor Davis wrote:
> Use it just like dev.off(), but it *will* restore the previous device.
I'm observing that if t
like dev.off(), but it *will* restore the previous device.
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I think this is a `ragg` device bug, so I've posted an issue there:
https://github.com/r-lib/ragg/issues/143 . That issue contains slightly
more detail than I included in the earlier message here.
Duncan Murdoch
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st
which is likeliest?
- I have some misconception about how this is supposed to work
- The Kanji font on my system misreports some measurements
- The ragg::agg_png() device misreports measurements
- Some other bug somewhere.
Duncan
On 26/09/2023 5:57 a.m., Duncan Murdoch wrote:
Thanks
Thanks! I said "base graphics" in my question, but I really have no
objection to using grid graphics, so I'll explore those grid functions.
Duncan Murdoch
On 25/09/2023 3:53 p.m., Paul Murrell wrote:
Hi
strheight(), which is based GEStrHeight(), is pretty crude, not only
igno
ight"
value that includes lots of space below the character, and a
"top_border" value that measures from the top of the textbox to the
baseline. So I think `height - top_border` would give me what I'm
asking for. But this only works with graph
ext() match the values used by your Cairo package,
or are equivalent measurements available elsewhere?
Duncan Murdoch
On 24/09/2023 6:55 p.m., Simon Urbanek wrote:
Duncan,
drawing text is one of the most complicated things you can do, so it really
depends how for you want to go. You can d
itive and
possibly less error prone.
If you don't list any examples of problems, then the only possible
conclusion is that there aren't any except obscure ones, so the answer
is clearly that it is not worth it to make this change.
Duncan Murdoch
Regards,
Simone
On Sat, Sep 23,
e.g. if some user interaction requires the axis labels to be
recomputed and redrawn.
Does anyone with experience doing this kind of thing know of examples I
can follow, or have advice on how to proceed? Or want to volunteer to
help with this?
Duncan Murdoch
__
It's been documented for a long time that NCOL(NULL) is 1. What
particular problems did you have in mind? There might be other ways to
guard against them.
Duncan Murdoch
On 23/09/2023 1:43 p.m., Simone Giannerini wrote:
Dear list,
I do not know what would be the 'correct'
.
identical(NA, NA_real_) is FALSE, as it should be). If you are using a
different test, that's user error.
Duncan Murdoch
On 22/09/2023 2:41 p.m., Hervé Pagès wrote:
We could also question the value of having an infinite number of NA
representations in the complex space. For example all thes
Sorry, it's a silly thinko. I misspelled the vline argument. Thanks
Ivan for the gentle nudge!
Duncan Murdoch
On 19/09/2023 10:44 a.m., Duncan Murdoch wrote:
The knitr::kable() function does some internal setup, including
determining the target format, and then calls an internal fun
ot;1", "1", "0", "0", "0", "4", "4", "4",
"3", "3", "3", "4", "4", "1", "1", "2", "1"), caption = NULL,
escape = TRUE, vlign = &
<<8) + entry[1] - 1;
where entry is declared as a pointer to a char. What this is doing is
extracting a 16 bit number from the first two bytes of a character
string holding the name of the capture group. Since char is a signed
type, the conversion of bytes to integer gets messed up and th
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