Hello,
it is not clear to me, how to search if in a string there is a "." (full
stop).
Using:

grepl(".",string)

doesn't work because the full stop it is a metacharacter (it gives "TRUE"
also if no full stop is in the character). I tried also to insert \. but it
does not work.

> grepl("\.",string)
Error: '\.' is an unrecognized escape in character string starting "\."

Thank you very much for your help

Francesco

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