-----Original Message----- From: Nutter, Benjamin Sent: Monday, February 02, 2009 7:37 AM To: 'venkata kirankumar' Subject: RE: [R] parsing problem
This is how I would approach it. I'd be happy to know if there's a better way. #*** Initial Data Frame x <- c("Kontrolle","Placebo","125mg/kg","250mg/kg","500mg/kg","1000mg/kg")) x #*** Convert alphabetical and punctuation characters to "" (see ?regex) y <- gsub("[[:alpha:],[:punct:]]","",x) y #*** Convert character strings to numeric z <- as.numeric(y) z #*** Calculate minimum min(df$z,na.rm=TRUE) -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of venkata kirankumar Sent: Monday, February 02, 2009 7:18 AM To: r-help@r-project.org Subject: [R] parsing problem Hi all, I am trying to parse a vector for caliculating minimum in that vector the vector having values like 1 Kontrolle 2 Placebo 3 125mg/kg 4 250mg/kg 5 500mg/kg 6 1000mg/kg hear i tries for comverting it into numeric with using "as.numaric()" function but i got values like 5 6 2 3 4 1 it gives 1000mg/kg is the least one but i have toget 125mg/kg as the minimum value for that i have to remove all the strings and spetial charecters from that for that i used "parse()" but i am not able to get the out put can anyone suggest how I will solve it thanks in advance regards; kiran [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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. =================================== P Please consider the environment before printing this e-mail Cleveland Clinic is ranked one of the top hospitals in America by U.S. News & World Report (2008). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use\...{{dropped:13}} ______________________________________________ R-help@r-project.org mailing list 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.