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...t you mention, contain functions that should probably be replaced by functions with better implementation from packages on CRAN. Best regards Morgan On Fri, 11 Oct 2019 15:22 Joris Meys, <jorismeys at gmail.com> wrote: > > > On Fri, Oct 11, 2019 at 3:55 PM Morgan Morgan <morgan.emailbox at gmail.com> > wrote: > >> How do you prove usefulness of a feature? >> Do you have an example of a feature that has been added after proving to >> be >> useful in the package space first? >> >> Thank you, >> Morgan >> > > The parallel...

...s interesting suggestion, Morgan. While there is no strict > criteria for base R inclusion, one criterion relevant in this case is that > the usefulness of a feature be proven in the package space first. > > Michael > > > On Fri, Oct 11, 2019 at 5:19 AM Morgan Morgan <morgan.emailbox at gmail.com> > wrote: > >> On Fri, 11 Oct 2019 10:45 Duncan Murdoch, <murdoch.duncan at gmail.com> >> wrote: >> >> > On 11/10/2019 6:44 a.m., Morgan Morgan wrote: >> > > Hi All, >> > > >> > > I was looking for a function...

hi, is this a feature or a bug in conjunction with apple mail. i usually use the feature in imap to not delete the emails, but only mark them as deleted, which is a very usefull feature if you use a emailbox with more people accessing it. Im now trying an SME server installation with dovecot 0.99.10, and when i delete a message, it gets marked as deletet, but as soon as i change the mailbox the mail gets also expunged from it. is this a bug fixed in the newer dovecot releases ? or is this a featur...

...R(e), r_true); > SET_TAG(CDDR(e), install(\"na.rm\")); > Rf_PrintValue(e); > SEXP ans = PROTECT(eval(e, R_GlobalEnv)); > UNPROTECT(3); > return ans; > > ") > > call_to_sum(c(1L,NA,3L)) > > On Tue, Jun 30, 2020 at 10:08 AM Morgan Morgan > <morgan.emailbox at gmail.com> wrote: >> Hi All, >> >> I was reading the R extension manual section 5.11 ( Evaluating R expression >> from C) and I tried to build a simple call to the sum function. Please see >> below. >> >> call_to_sum <- inline::cfunction( >>...

...point precision error. Best, Brodie. [1] https://github.com/wch/r-source/blob/tags/R-4-0-0/src/main/summary.c#L482 > > a2=(z[idx]+x[idx]+y[idx])/3 > > a2==a > [1] FALSE > > a2==b > [1] TRUE > > -pd > > > On 20 May 2020, at 12:40 , Morgan Morgan <morgan.emailbox at gmail.com> wrote: > > > > Hello R-dev, > > > > Yesterday, while I was testing the newly implemented function pmean in > > package kit, I noticed a mismatch in the output of the below R expressions. > > > > set.seed(123) > > n=1e3L > > idx=...

...ather than any technical need to be in the core > distribution. Having them as a core (or recommended) package makes them > harder update independently to R and makes testing, development and > contribution more cumbersome. > > On Fri, Mar 1, 2019 at 4:35 AM Morgan Morgan <morgan.emailbox at gmail.com> > wrote: > >> Hi, >> >> It sometimes happens that some packages get included to R like for example >> the parallel package. >> >> I was wondering if there is a process to decide whether or not to include a >> package in the core impl...

Hi, It sometimes happens that some packages get included to R like for example the parallel package. I was wondering if there is a process to decide whether or not to include a package in the core implementation of R? For example, why not include the Rcpp package, which became for a lot of user the main tool to extend R? What is our view on the (not so well known) dotCall64 package which is an

Hi, I am wondering if the below is possible? Let's assume I have the following expression: 1:10 < 5 Is there a way at the R C API level to only evaluate the 5th element (i.e 5 < 5) instead of evaluating the whole expression and then select the 5th element in the logical vector? Thank you Best regards Morgan [[alternative HTML version deleted]]

Hello R-dev, Yesterday, while I was testing the newly implemented function pmean in package kit, I noticed a mismatch in the output of the below R expressions. set.seed(123) n=1e3L idx=5 x=rnorm(n) y=rnorm(n) z=rnorm(n) a=(x[idx]+y[idx]+z[idx])/3 b=mean(c(x[idx],y[idx],z[idx])) a==b # [1] FALSE For idx= 1, 2, 3, 4 the last line is equal to TRUE. For 5, 6 and many others the difference is small

On Fri, 11 Oct 2019 10:45 Duncan Murdoch, <murdoch.duncan at gmail.com> wrote: > On 11/10/2019 6:44 a.m., Morgan Morgan wrote: > > Hi All, > > > > I was looking for a function to find a small matrix inside a larger > matrix > > in R similar to the one described in the following link: > > > > >

...or the 2012 discussion. My point is it?s really really difficult to get something in Base R. Develop it well, put it in a package, and you have basically the same result. Avi [1] https://stat.ethz.ch/pipermail/r-devel/2012-June/064351.html On Fri, Oct 11, 2019 at 9:55 AM Morgan Morgan <morgan.emailbox at gmail.com> wrote: > How do you prove usefulness of a feature? > Do you have an example of a feature that has been added after proving to be > useful in the package space first? > > Thank you, > Morgan > > On Fri, 11 Oct 2019 13:53 Michael Lawrence, <lawrence.michae...

Hi, Hope you are well. I was wondering if there is a function at C level that is equivalent to mtcars$carb or .subset2(mtcars, "carb"). If I have the index of the column then the answer would be VECTOR_ELT(df, asInteger(idx)) but I was wondering if there is a way to do it directly from the name of the column without having to loop over columns names to find the index? Thank you Best

...wo-pass scan over the elements too lower the impact of > addition of values with widely different values (classical problem in > numerical analysis). But I can see how it may look like that. > > Cheers, > > Henrik > > > On Thu, May 21, 2020, 03:21 Morgan Morgan <morgan.emailbox at gmail.com> > wrote: > >> Thank you Henrik for the feedback. >> Note that for idx=4 and refine = TRUE, your equality b==c is FALSE. I >> think that as Peter said == can't be trusted with FP. >> His example is good. Here is an even more shocking one. >>...

Hi, Is there a way to resize a matrix defined as follows: SEXP a = PROTECT(allocMatrix(INTSXP, 10, 2)); int *pa = INTEGER(a) To row = 5 and col = 1 or do I have to allocate a second matrix "b" with pointer *pb and do a "for" loop to transfer the value of a to b? Thank you Best regards Morgan [[alternative HTML version deleted]]

...SE, align = "left") ) > ## [1] 4 9 > > # 2 - Base R using conversion to character > gregexpr(paste(x, collapse = ""), paste(A, collapse = ""))[[1]] > ## [1] 4 9 > ...snip ... > > On Fri, Oct 11, 2019 at 3:45 AM Morgan Morgan <morgan.emailbox at gmail.com> wrote: > > > > Hi All, > > > > I was looking for a function to find a small matrix inside a larger matrix > > in R similar to the one described in the following link: > > > > https://www.mathworks.com/matlabcentral/answers/194708-index-a-sm...

...ore > > distribution. Having them as a core (or recommended) package makes them > > harder update independently to R and makes testing, development and > > contribution more cumbersome. > > > > On Fri, Mar 1, 2019 at 4:35 AM Morgan Morgan <morgan.emailbox at gmail.com <mailto:morgan.emailbox at gmail.com>> > > wrote: > > > >> Hi, > >> > >> It sometimes happens that some packages get included to R like for example > >> the parallel package. > >> > &gt...

Hi All, I was reading the R extension manual section 5.11 ( Evaluating R expression from C) and I tried to build a simple call to the sum function. Please see below. call_to_sum <- inline::cfunction( language = "C", sig = c(x = "SEXP"), body = " SEXP e = PROTECT(lang2(install(\"sum\"), x)); SEXP ans = PROTECT(eval(e, R_GlobalEnv)); UNPROTECT(2); return

Hi, Using the R C PAI, is there a way to convert to convert STRSXP or INTSXP to factor. The idea would be to do in C something similar to the "factor" function (example below): > letters[1:5] # [1] "a" "b" "c" "d" "e" > factor(letters[1:5]) # [1] a b c d e # Levels: a b c d e There is the function setAttrib the levels of a SXP

...in R does not use them but manage to achieve that. switch(1, "a", stop("a")) #[1] "a" It is a primitive but I don't understand how it manage to do that. Best, Morgan > Best, > Jiefei > > > On Mon, Nov 4, 2019 at 2:41 PM Morgan Morgan <morgan.emailbox at gmail.com> > wrote: > >> Hi All, >> >> I have some questions regarding the R C API. >> >> Let's assume I have a function which is defined as follows: >> >> R file: >> >> myfunc <- function(a, b, ...) .External(Cfun, a, b, ...)...

Hi All, I have some questions regarding the R C API. Let's assume I have a function which is defined as follows: R file: myfunc <- function(a, b, ...) .External(Cfun, a, b, ...) C file: SEXP Cfun(SEXP args) { args = CDR(args); SEXP a = CAR(args); args = CDR(args); SEXP b = CAR(args); args = CDR(args); /* continue to do something with remaining arguments in "..."