Publicly produce something we can work with. I have no idea how to
create an example that will match such an object.
?dput
?dump
Read Posting Guide.
--
David.
On Jun 16, 2010, at 12:54 PM, Andrej wrote:
Thanks David for your fast reply, but now I realized tat "string" is
of type:
class(string)
[1] "jobjRef"
attr(,"package")
[1] "rJava"
so I get an error when i try with gsub or sub:
sub("^.+\\t(\\d+)\\n.+$", "\\1", string)
Error in as.character.default(x) :
no method for coercing this S4 class to a vector
I think that there should be trivial solution, but... Any further
idea?
Regards, Andrej
On Jun 16, 6:47 pm, David Winsemius <dwinsem...@comcast.net> wrote:
On Jun 16, 2010, at 12:04 PM, Andrej wrote:
Dear all,
I'm trying to filter out the "number of leaves" (it should be 1 in
the
example below) from the following string:
string
[1] "Java-Object{J48 pruned tree\n------------------\n: 0
(15.0/3.0)\n
\nNumber of Leaves : \t1\n\nSize of the tree : \t1\n}"
Any idea how to do that as simple as possible? Thanks in advance for
any advice.
?sub # or ?gsub if you need more than one pattern matched (they are
on the same page).
This should find the first occurrence of digits following a tab
terminated by a line feed and then return only the digits:
string <- "Java-Object{J48 pruned tree\n------------------\n: 0
(15.0/3.0)\n \nNumber of Leaves : \t1\n\nSize of the tree : \t1\n}"
sub("^.+\\t(\\d+)\\n.+$", "\\1", string)
[1] "1"
The parens within the search pattern are matched to "\\1". Need to
double backslashed within patterns.
Regards, Andrej
--
David Winsemius, MD
West Hartford, CT
______________________________________________
r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/
listinfo/r-help
PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
