[R] grep with "|" character

Daniel Brewer daniel.brewer at icr.ac.uk
Tue Oct 23 12:34:22 CEST 2007


I am having a problem searching for the "|" character in a string.

> grep("|",stringvector)
Gives all the strings in a vector but when I try to escape it
> grep("\|",stringvector)
It comes up with the error
Warning messages:
1: '\|' is an unrecognized escape in a character string
2: unrecognized escape removed from "\|"

Anyone know how to solve this?


Daniel Brewer, Ph.D.
Institute of Cancer Research
Email: daniel.brewer at icr.ac.uk

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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