[R] Why does substr<- truncate and not replace...
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Sat Sep 8 00:00:10 CEST 2001
Thomas Vogels <tov at ece.cmu.edu> writes:
> ... when the replacement string is shorter than the portion of the
> string to be replaced?
> The documentation to substr (in R 1.3.1) gives me:
> If the portion to be replaced is longer than the replacement
> string, then only the portion the length of the string is
> And so I try:
> R> x <- "abcdef"
> R> substr(x,2,3) <- "xy" #ok
> R> x
>  "axydef"
> R> substr(x,2,3) <- "w" #ko
> R> x
>  "aw"
> hmm, I would have expected "awdef". Am I reading the docs wrong? (Or
> am I just blinded to expect this string because that's what Perl would do?)
Looks like a bit of a bug. I bet the \0 terminator gets copied in from
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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