Re: [R] conditional rowsums in sapply

Hello David, I'm not sure I get your question; if you replied to SO, I had not seen it. I posted there today. I'm reading it now! I chose not to receive replies in my email from SO but I must change that. Thank you for making me see that! Sorry, I'm new to R-help and, especially, SO. Thanks for y

[R] conditional rowsums in sapply

Hi all I have a data frame with duplicate columns and i want to remove duplicates by adding rows in each group of duplicates, but have lots of NA's. Data: dfrm <- data.frame(a = 1:4, b= 1:4, cc= 1:4, dd=1:10, ee=1:4) names(dfrm) <- c("a", "a", "b", "b", "b") dfrm[3,2:3]<-NA dfrm a a b b b

Re: [R] problem converting character to dates

I have imported the data fram Excel and it comes like this: Calendar Year/Month 01.2008 01.2008 01.2008 01.2008 01.2008 02.2008 02.2008 Calendar year / week01.2008 02.2008 03.2008 04.2008 05.2008 05.2008 06.2008 There are repeats in the weeks both belonging to two months. It's the same at

Re: [R] problem converting character to dates

Thanks Uwe, it works! I just have a problem at week 53 which gives me an NA. I guess, this week 53 has to do with the data type set at the database design and collection of data. Depends on the week/year kind of counting. -- View this message in context: http://r.789695.n4.nabble.com/problem-co

[R] problem converting character to dates

ear, so I do: >as.Date(adates,format=c("%W/%y")) and get [1] "2020-05-12" "2020-05-12" "2020-05-12" "2020-05-12" "2020-05-12" [6] "2020-05-12" "2020-05-12" "2020-05-12" "2020-05-12" &quo