Dear Bert,
The variable patt does not exist in the R environment. I was pasting the code for an R function in the R console and I had a syntax error on a line. But the next lines executed simply as simple R code. The variable patt was not previously defined. Though x was a different object and the long execution time may originate there. x = original xml with the Pubmed abstracts Sincerely, Leonard On 5/19/2022 3:31 AM, Bert Gunter wrote: > Doubt that I can help, but what does "not defined" mean? -- NA, "", " > " ? Something else? > I would guess that if it's NA, you should get an immediate error. > If it's "" , that's a legitimate pattern and would result in matches > of 0 length for everything, which might trigger an error in other > parts of your code. > All a guess, though. > > Bert Gunter > > "The trouble with having an open mind is that people keep coming along > and sticking things into it." > -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) > > > On Wed, May 18, 2022 at 5:08 PM Leonard Mada via R-help > <r-help@r-project.org> wrote: > > Dear R Users, > > > I have run the following command in R: > > # x = larger vector of strings (1200 Pubmed abstracts); > # patt = not defined; > npos = regexpr(patt, x, perl=TRUE); > # Error in regexpr(patt, x, perl = TRUE) : object 'patt' not found > > > The problem: > > R becomes unresponsive and it takes 1-2 minutes to return the > error. The > operation completes almost instantaneously with a valid pattern. > > Is there a reason for this behavior? > > Tested with R 4.2.0 on MS Windows 10. > > > I have uploaded a set with 1200 Pubmed abstracts on Github, if anyone > wants to check: > > - see file: Example_Abstracts_Title_Pubmed.csv; > > https://github.com/discoleo/R/tree/master/TextMining/Pubmed > > The variable patt was not defined due to an error: but it took > very long > to exit the operation and report the error. > > > Many thanks, > > > Leonard > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > <http://www.R-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
