marc schwartz marc_schwartzcomcastnet 08052008 0855 pm aleczwartcsiroau wrote hi folks anyone enlighten get following search csv end string grepcsvblahcsvvaluetrue 1 blahcsv warning messages 1 unrecognized escape character string 2 unrecognized escape removed csv r reference regular expressions says metacharacter special meaning may quoted preceding backslash metacharacters eres missing something right way match period anyone tell cant find anything r reference look little lower page notes patterns described would printed cat remember backslashes need doubled entering r character strings eg keyboard thus grepcsv blahcsv value true also see faq 737 httpcranrprojectorgdocfaqrfaqhtmlwhydoesbackslashbehavestrangelyinsidestrings_003f im using r 26 windows xp time upgrade271 current version hth marc schwartz ______________________________________________ rhelprprojectorg mailing list httpsstatethzchmailmanlistinforhelp please read posting guide httpwwwrprojectorgpostingguidehtml provide commented minimal selfcontained reproducible code tue 05 aug 2008 212505 0500 r matching period grep