Hi all
Is there any compiler for R ? By compiler, I mean something that check
the cleanliness of the code : if we declare all the variables we use, if
we don't use external variable from a function and so on...
For exemple, something that will ring a bell on the following code
(saying "line 4 : 'pp' undefine in function 'power' ")
1. pp <- 3
2. power <- function(x){
3. p <- 2
4. return(2^pp)
5. }
thanks
Christophe
On 22/11/2007 5:12 PM, Christophe Genolini wrote:> Hi all > > Is there any compiler for R ? By compiler, I mean something that check > the cleanliness of the code : if we declare all the variables we use, if > we don't use external variable from a function and so on... > For exemple, something that will ring a bell on the following code > (saying "line 4 : 'pp' undefine in function 'power' ") > > 1. pp <- 3 > 2. power <- function(x){ > 3. p <- 2 > 4. return(2^pp) > 5. }You can use R CMD check if you've got your code in a package. That code won't generate a warning, because pp is visible from within power. If you had left the pp assignment off, the codetools tests would flag it. Duncan Murdoch
See the codetools package:> library(codetools) > checkUsage(power)<anonymous>: local variable 'p' assigned but may not be used> findGlobals(power)[1] "^" "{" "<-" "pp" "return" On Nov 22, 2007 5:12 PM, Christophe Genolini <cgenolin at u-paris10.fr> wrote:> Hi all > > Is there any compiler for R ? By compiler, I mean something that check > the cleanliness of the code : if we declare all the variables we use, if > we don't use external variable from a function and so on... > For exemple, something that will ring a bell on the following code > (saying "line 4 : 'pp' undefine in function 'power' ") > > 1. pp <- 3 > 2. power <- function(x){ > 3. p <- 2 > 4. return(2^pp) > 5. } > > thanks > > Christophe > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >