[R] segfault 'memory not mapped', dual core problem?

[Jeffrey Robert Spies]

What failed for you did not fail for me.

 > version
          _
platform powerpc-apple-darwin7.9.0
arch     powerpc
os       darwin7.9.0
system   powerpc, darwin7.9.0
status
major    2
minor    2.1
year     2005
month    12
day      20
svn rev  36812
language R

Just to help bound the problem,

Jeff

On Nov 12, 2006, at 3:55 PM, Benilton Carvalho wrote:

>
> On Nov 12, 2006, at 3:35 PM, Peter Dalgaard wrote:
>
>>> My fix was to remap my group variable so that it would always start
>>> from 1.
>>
>> Ugh!
>>
>> You shouldn't "fix" something like that, instead try your very  
>> best to
>> find circumstances where you reproduce the crash as quickly as
>> possible, prefering using a minimal setup without external data, and
>> report it (or try debugging it yourself).
>
> I reported on Sep 7th (the maintainer directly). But I haven't heard
> back, nor the solution implemented yet. Probably a matter of time?
>
> Anyways, all one need to do is:
>
> #####
>
> require(cluster)
> set.seed(1)
> x=rnorm(100)
> g=sample(2:4, 100, replace=T)
>
> for (i in 1:10){
>   print(i)
>   tmp1=silhouette(g, dist(x))
> }
>
> ######
>
> the above fails on the 2nd step, ie, i==2.
>
> But using the code below, it works as expected.
>
> #####
>
> require(cluster)
> set.seed(1)
> x=rnorm(100)
> g=sample(2:4, 100, replace=T)
>
> for (i in 1:1000){
>   print(i)
>   tmp2=silhouette(as.numeric(as.factor(g)), dist(x))
> }
>
> ######
>
> Btw, tmp1 and tmp2 are two different results...
>
> Cheers,
> Benilton
>
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