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
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