search for: zhengda1936

...on(a,b,c) base::`if`(a, b, c) > ? `if.foo` <- function(a, b, c) FALSE > ? a <- structure(42, class = "foo") > > ? if (a) TRUE else FALSE > [1] FALSE > > ? if (1) TRUE else FALSE > [1] TRUE > > Gabor > > On Sat, Mar 4, 2017 at 5:47 PM, Da Zheng <zhengda1936 at gmail.com> wrote: >> Thanks. >> Can I override it for a specific class? >> I can do that for operators such as "!". For example, "!.fm" works for >> objects of the class "fm". >> It seems I can't do the same for "if". &...

On Sun, Mar 5, 2017 at 2:50 PM, Michael Lawrence <lawrence.michael at gene.com> wrote: > > > On Sat, Mar 4, 2017 at 12:36 PM, Da Zheng <zhengda1936 at gmail.com> wrote: >> >> In my case, I create a new type of matrices and override matrix >> operations in R for these matrices. >> My goal is to make the system as transparent as possible, which means >> my system should execute the existing R code without modific...

...n my own vectors and matrices directly. Does this sound reasonable? Best, Da On Sat, Mar 4, 2017 at 3:22 PM, Michael Lawrence <lawrence.michael at gene.com> wrote: > I'm curious as to precisely why someone would want to do this. > > On Sat, Mar 4, 2017 at 11:49 AM, Da Zheng <zhengda1936 at gmail.com> wrote: >> >> I'm just curious. Why making "if" generic is even more dangerous? >> >> Best, >> Da >> >> On Sat, Mar 4, 2017 at 1:22 PM, G?bor Cs?rdi <csardi.gabor at gmail.com> >> wrote: >> > `!` is a gener...

...led out from it, or the dot-product of two vectors in your system, both of which would be values (scalars) not matrices. Now ifelse(), is of course, a different beast altogether, and would need to be overloaded within your system, I imagine. Best, ~G On Sun, Mar 5, 2017 at 12:52 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > On Sun, Mar 5, 2017 at 2:50 PM, Michael Lawrence > <lawrence.michael at gene.com> wrote: > > > > > > On Sat, Mar 4, 2017 at 12:36 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > >> > >> In my case, I create a new type...

...Mar 4, 2017 at 12:41 PM, G?bor Cs?rdi <csardi.gabor at gmail.com> wrote: > You can. Perhaps needless to say, be careful with this. > > ? `if` <- function(...) FALSE > ? if (TRUE) TRUE else FALSE > [1] FALSE > > G. > > On Sat, Mar 4, 2017 at 5:36 PM, Da Zheng <zhengda1936 at gmail.com> wrote: >> Hello, >> >> I heard we can override almost everything in R. Is it possible to >> override "if" keyword in R to evaluate my own object instead of a >> logical value? >> >> Thanks, >> Da >> >> __________...

...led out from it, or the dot-product of two vectors in your system, both of which would be values (scalars) not matrices. Now ifelse(), is of course, a different beast altogether, and would need to be overloaded within your system, I imagine. Best, ~G On Sun, Mar 5, 2017 at 12:52 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > On Sun, Mar 5, 2017 at 2:50 PM, Michael Lawrence > <lawrence.michael at gene.com> wrote: > > > > > > On Sat, Mar 4, 2017 at 12:36 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > >> > >> In my case, I create a new type...

On Sat, Mar 4, 2017 at 12:36 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > In my case, I create a new type of matrices and override matrix > operations in R for these matrices. > My goal is to make the system as transparent as possible, which means > my system should execute the existing R code without modification. > The problem...

I'm curious as to precisely why someone would want to do this. On Sat, Mar 4, 2017 at 11:49 AM, Da Zheng <zhengda1936 at gmail.com> wrote: > I'm just curious. Why making "if" generic is even more dangerous? > > Best, > Da > > On Sat, Mar 4, 2017 at 1:22 PM, G?bor Cs?rdi <csardi.gabor at gmail.com> > wrote: > > `!` is a generic, `if` is not. You can define an `if`...

Because the S3 class system is very informal. E.g. if you happen to have an `if.whatever` function, that will be automatically a method of your generic. Gabor On Sat, Mar 4, 2017 at 7:49 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > I'm just curious. Why making "if" generic is even more dangerous? > > Best, > Da > > On Sat, Mar 4, 2017 at 1:22 PM, G?bor Cs?rdi <csardi.gabor at gmail.com> wrote: >> `!` is a generic, `if` is not. You can define an `if` that is...

Hello, I'm trying to submit my package to CRAN. When I read the policy, it says: Package authors should make all reasonable efforts to provide cross-platform portable code. Packages will not normally be accepted that do not run on at least two of the major R platforms. What major R platforms does this policy refer to? Currently, my package runs in Ubuntu. If it works on both Ubuntu and

On 27 January 2017 at 21:54, G?bor Cs?rdi wrote: | On Fri, Jan 27, 2017 at 9:28 PM, Da Zheng <zhengda1936 at gmail.com> wrote: | > What major R platforms does this policy refer to? | > | | Linux, macOS, Windows. | | | > Currently, my package runs in Ubuntu. If it works on both Ubuntu and | > Redhat, does it count as two platforms? | > | | I think that Linux is just one. Is it hard...

Hello, I heard we can override almost everything in R. Is it possible to override "if" keyword in R to evaluate my own object instead of a logical value? Thanks, Da

Hello, I'm trying to override pmin and pmax for my own matrix. These two functions have ... as an argument. I tried to override them as follows: setMethod("pmax", class_name, function(x, ..., na.rm) { ... }) I use this way to override primitive functions such as min/max and it works fine. But it doesn't work for pmin and pmax. I guess because they are regular functions? How

...{ }) One caveat is that all arguments passed via "..." must derive from the class specified for "..." in the method signature. At some point we should solve that by introducing a binary pmin2, pmax2 as we have for cbind and rbind. On Thu, Dec 24, 2015 at 5:54 AM, Da Zheng <zhengda1936 at gmail.com> wrote: > Hello, > > I'm trying to override pmin and pmax for my own matrix. These two > functions have ... as an argument. I tried to override them as > follows: > setMethod("pmax", class_name, function(x, ..., na.rm) { ... }) > > I use thi...

...m/project/HenrikBengtsson/globals /Henrik PS. Thanks to everyone who made all of the above possible. On Fri, Jan 27, 2017 at 2:17 PM, Dirk Eddelbuettel <edd at debian.org> wrote: > > On 27 January 2017 at 21:54, G?bor Cs?rdi wrote: > | On Fri, Jan 27, 2017 at 9:28 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > | > What major R platforms does this policy refer to? > | > > | > | Linux, macOS, Windows. > | > | > | > Currently, my package runs in Ubuntu. If it works on both Ubuntu and > | > Redhat, does it count as two platforms? > | > >...

You can. Perhaps needless to say, be careful with this. ? `if` <- function(...) FALSE ? if (TRUE) TRUE else FALSE [1] FALSE G. On Sat, Mar 4, 2017 at 5:36 PM, Da Zheng <zhengda1936 at gmail.com> wrote: > Hello, > > I heard we can override almost everything in R. Is it possible to > override "if" keyword in R to evaluate my own object instead of a > logical value? > > Thanks, > Da > > ______________________________________________ &gt...

Hello, I wrote a system to perform data analysis in C++. Now I am integrating it to R. I need to allocate memory for my own C++ data structures, which can't be represented by any R data structures. I create a global hashtable to keep a reference to the C++ data structures. Whenever I allocate one, I register it in the hashtable and return its key to the R code. So later on, the R code can

Hello, I'm writing an R extension in C++. In the extension, I want to invoke an R function directly and it works when I use Rcpp in the serial code. But what I really want is to invoke the R function in parallel with openmp. When I do so, I got segmentation fault. I remember someone said that R isn't thread-safe. I think it's also understandable because an R function also has

Hello Dirk, Thank you very much for your reply. The main reason I want to remove the debug info is that when I use R CMD check on my package, it gives the following info * checking installed package size ... NOTE installed size is 223.6Mb sub-directories of 1Mb or more: libs 223.1Mb CRAN requires an R package to pass all checks and fix all complaints including NOTEs. It seems R's

Hello, I'm writing an R package that is mainly written in C++. By default, R CMD INSTALL creates C/C++ flags as follows: -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -g However, my package is fairly large. With debug info compiled into the library, the generated .so file is over 200MB. Without debug info, it's about 30MB. I hope