[R] R help

[arun]

Hi,
Try:
dat <- read.table(text="Emails
Mal123 at gmail.com
Mahi.r at gmail.com
xyz at gmail.com
Ravi_123 at yahoo.com
Lavk.lll at rediff.com
xy at 12_g.com",sep="",header=TRUE,stringsAsFactors=FALSE)
 vec1 <- gsub("\\.[[:alnum:]]+$","",gsub("^([[:alpha:]]+)(\\d+.*)","\\1_\\2",dat$Emails))

indx1 <- grep("[[:punct:]]+",gsub("\\@.*","",vec1))
res <- setNames(cbind(dat,do.call(rbind,lapply(seq_along(vec1),function(i) if(i %in% indx1){strsplit(vec1[i],"[_ at .]")[[1]]} else strsplit(gsub("(.*)(\\@.*)","\\1*\\2",vec1[i]),"[*@]")[[1]]))),c("Emails","f.name","l.name","domain"))
 res[sapply(res,is.factor)] <- lapply(res[sapply(res,is.factor)],as.character)
res
#               Emails f.name l.name domain
#1    Mal123 at gmail.com    Mal    123  gmail
#2    Mahi.r at gmail.com   Mahi      r  gmail
#3       xyz at gmail.com    xyz         gmail
#4  Ravi_123 at yahoo.com   Ravi    123  yahoo
#5 Lavk.lll at rediff.com   Lavk    lll rediff
#6         xy at 12_g.com     xy          12_g

A.K.




On Thursday, February 6, 2014 4:16 AM, Malyadri Putchakayala <malyadri.putchakayala at nuevora.com> wrote:


Hi,

Emails

Mal123 at gmail.com

Mahi.r at gmail.com

Ravi_123 at yahoo.com

Lavk.lll at rediff.com
xyz at gmail.com
xy at 12_g.com

I need split firstname,lastname,domail(only gmail,not gmail.com),also 123 in
last name,so please give me help

Output is 

Emails                                     f.name   l.name    domain

Mal123 at gmail.com         mal           123           gmail

Mahi.r at gmail.com           mahi        r                gmail

Ravi_123 at yahoo.com     ravi       123            gmail

Lavk.lll at rediff.com    lavk        111              gmail
xyz at gmail.com           xyz                          gmail
xy at 12_g.com              xy         12_g                      

Please give me solution