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60,6
2006 May 16
2
Large database help
...em.time(a<-matrix(runif(1e6),nrow=1))
[1] 0.28 0.02 2.42 NA NA
> gc()
used (Mb) gc trigger (Mb) max used (Mb)
Ncells 171344 4.6 350000 9.4 350000 9.4
Vcells 1063212 8.2 3454398 26.4 4063230 31.0
> rm(a)
> ls()
character(0)
> system.time(a<-matrix(runif(60e6),nrow=1))
Error: not possible to alocate vector of size 468750 Kb
Timing stopped at: 7.32 1.95 83.55 NA NA
> memory.limit(size=5000)
Erro em memory.size(size) : .....4GB
So my questions are:
1) (newbie) how can I read fixed-columns text files like this?
2) is there a way I can analyze (statist...