Hi,
Am I missing something in using regexps in R?
Below, 'egrep' means invokation of the command from the shell
prompt.
# I have
> as.character(block.dist.vals)
[1] "1e+06" "2e+06" "5e+06"
# that I wish to convert to: "1" "2" "5"
# OK (R and egrep)
> sub( "e.+06", "", as.character(block.dist.vals) )
[1] "1" "2" "5"
# OK (R), egrep will *not* match pattern
> sub( "e\\+06", "", as.character(block.dist.vals) )
[1] "1" "2" "5"
# egrep will match pattern; R will not.
> sub( "e\+06", "", as.character(block.dist.vals) )
[1] "1e+06" "2e+06" "5e+06"
As-far-as I can tell the last attempt should have worked, too.
Could someone explain to me why it doesn't?
I have R 1.7.0 on RedHat 9.
Thanks in advance,
Itay Furman
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Fred Hutchinson Cancer Research Center
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