search for: showargs

Hi, I am trying to implement on a Win7 box the showArgs example of section 5.10.2 "Calling .External" of the R extension manual. I am using interchangeably gcc (RTools) and Visual C++ (via Makefile.win) to build a package. I get a couple of runtime oddities when the dll compiled with Visual C++. I'd value comments, observations and tips fr...

Full_Name: Glen Herrmannsfeldt Version: 2.2.1 OS: Linux Submission from: (NULL) (128.95.113.77) Following the discussion in "Writing R Extensions" in section 5.8.2, there is no indication that showArgs expects a pairlist() instead of a list(). I was trying .Call("showArgs",list(one=1,two=2,three=3)) for example, and getting many core dumps. It wasn't until reading "R Language Definition" that I found out about pairlist(), as needed. The final example: showArgs<...

Hi R users: I try this code, where "fun" is a parameter of a random generating function name, and I pretend to use "..." parameter to pass the parameters of different random generating functions. What am I doing wrong? f1<-function(nsim=20,n=10,fun=rnorm,...){ vp<-replicate(nsim,t.test(fun(n,...),fun(n,...))$p.value) return(vp) } This works! f1()

Hi, I would like to report a small bug in one of the code examples given in the 'Writing R extensions' manual. Section 5.9.2 ("Calling .External") defines the function "showArgs" in order to demonstrate how to access in C the pair-listed arguments passed by .External. The function aims at printing echoing all passed arguments to the screen but only prints every second argument. The loop to go through the pair list starts as follows args = CDR(args); /* skip ...

...R Extensions" but there's not a lot of detail on this issue. I want to write a (very simple really) C external that will be able to take "..." as an argument. (It's for optimizing a function that may have several parameters besides the ones being optimized.) I got the "showArgs" code (from R-exts) to compile and install, but it only gives me error messages when I run it. I think I'm supposed to pass it different arguments from what I'm doing, but I have no idea which ones. What exactly are CAR, CDR, and CADR anyway? Why did the R development team choose this...

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