Actually, it worked perfectly for my sample data, but my actual data has
5.5 million rows, and grep doesn't seem to work with over a million rows.
Any idea on a workaround?
On Sat, Jan 26, 2013 at 9:37 PM, Yasha Podeswa <ypodeswa@gmail.com> wrote:
> Awesome, thanks Arun, that's exactly what I was looking for!
>
>
> On Sat, Jan 26, 2013 at 9:21 PM, arun kirshna [via R] <
> ml-node+s789695n4656749h63@n4.nabble.com> wrote:
>
>> Hi,
>> Try this:
>> df[]<-lapply(df,as.character)
>> df2<-df
>> df[,1][grep("@",df$names)]<- ""
>> df
>> #names emails
>> #1 bob bobj@cup.com
>> #2 joe joesmith@gmail.com
>> #3 craig@gmail.com
>> #4 emily emily2@yahoo.com
>> #5 jane@yahoo.com
>>
>> #2nd part:
>>
>> df2[-grep("@",df2$names),]
>> names emails
>> #1 bob bobj@cup.com
>> #2 joe joesmith@gmail.com
>> #4 emily emily2@yahoo.com
>> A.K.
>>
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