On 11 August 2016 at 06:28, Rajen Shah wrote:
| Hello,
|
| I am having trouble debugging a package that appears to work fine on Mac
| operating systems but crashes on Unix and Windows.
|
| I have found the following example that crashes on my Windows setup (session
| info copied below)
|
| IntegerVector runif_int2() {
| return wrap(floor(runif(1000000)));
| }
|
| When this is called about 5-10 times in succession R crashes (e.g. with
| set.seed(1), but this doesn't seem to matter).
|
| Any ideas about why this crashes would be much appreciated. To be clear, I am
| not looking for an alternative to the above code (which simply produces a
| vector of zeroes), but would like to know what aspects of this cause a crash
so
| I know what code structures may be causing problems in the package I am
| creating. The code does not appear to crash on Mac and I have yet to try it on
| Unix.
i) On my box it doesn't run (which is probably a bug)
R> library(Rcpp)
R> cppFunction("IntegerVector runif_int2() { return
wrap(floor(runif(1000000))); }")
R> set.seed(1)
R> replicate(100, runif_int2()) ## should probably use loop here...
Error in runif_int2() : unimplemented type 'integer' in 'coerceToInteger'
R>
ii) Your code is still "wrong" or less than ideal. You really are working
with doubles there, even after the floor() around runif. So maybe return a
double vector? Else assign explictly via a cast.
Dirk
|
| Many thanks in advance,
|
| Rajen
|
| Session info:
|
| R version 3.3.1 (2016-06-21)
| Platform: x86_64-w64-mingw32/x64 (64-bit)
| Running under: Windows >= 8 x64 (build 9200)
|
| locale:
| [1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
| LC_MONETARY=English_United States.1252
| [4] LC_NUMERIC=C LC_TIME=English_United States.1252
|
|
| attached base packages:
| [1] stats graphics grDevices utils datasets methods base
|
| loaded via a namespace (and not attached):
| [1] tools_3.3.1
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--
http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org
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