Re: [R] please help! Extract the row to the new file by using if-statment

Hi, On Fri, Jun 1, 2012 at 12:05 PM, pigpigmeow wrote: > Thank, it OK now > but I don't understand what is the meaning of y <- y[!is.na(y[5]),] > Thank in advance! This is very basic R syntax. You should definitely read the Introduction to R, and also ?"[" ?"!" ?is.na Sarah -- Sarah Goslee ht

Re: [R] please help! Extract the row to the new file by using if-statment

Thank, it OK now but I don't understand what is the meaning of y <- y[!is.na(y[5]),] Thank in advance! -- View this message in context: http://r.789695.n4.nabble.com/please-help-Extract-the-row-to-the-new-file-by-using-if-statment-tp4631957p4632090.html Sent from the R help mailing list archive

Re: [R] please help! Extract the row to the new file by using if-statment

Not sure whether I understand your data and objectives well enough but here is what I would do: To make my life easier, I used x as a variable name. I'm not using attach(). You can extract your data with something like y <- x[x$wrfta>= 255 | x$wrfta<= 65 & x$wrfrain == 0, ] y <- y[!is.na(y[5]),]

[R] please help! Extract the row to the new file by using if-statment

Dear all, I find some troubles about how to extact the row from csv. file by using if-statement condition. I want to extract the row if the rainfall is greater than the mean of rainfall and using the wrfta divided into 3 groups that's rainfall greater than mean -> group A ( create file group A_rai