scan() + error interferes with count.fields() in some cases (PR#248)
maechler@stat.math.ethz.ch
maechler@stat.math.ethz.ch
Fri, 13 Aug 1999 17:43:48 +0200 (MET DST)
As just mentioned on R-devel,
and originally reported (somewhat less concisely) by Adrian Trapletti,
This code
write(c(paste("\"", LETTERS[1:3],"\"", sep=""),1:3), nc=3)
scan("data") # gives error as it should
count.fields("data") # will be wrong
count.fields("data") # is now ok : 3 3
gives (in 0.64.2 and in 0.65 snapshot)
> write(c(paste("\"", LETTERS[1:3],"\"", sep=""),1:3), nc=3)
> scan("data") # gives error as it should
Error: "scan" expected a real got ""A""
> count.fields("data") # will be wrong
[1] 4 3
> count.fields("data") # is now ok : 3 3
[1] 3 3
>From my experiments, the problem seems to be the leading `` " '' ,
since the following also fails {and btw mixes up ESS ...}
write(c("\"A", "B", "C",1:3), nc=3)
scan("data") # gives error as it should
count.fields("data") # 3 3
count.fields("data") # >> Error in count.fields..: string terminated by nl..
Martin Maechler <maechler@stat.math.ethz.ch> http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum SOL G1 Sonneggstr.33
ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND
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