Hi I believe that it is not what is wanted (if the OP knows exactly what he whants, which I doubt).
your result is > Elder1 ID age 1 ID1 3 2 ID2 2 3 ID3 1 4 ID6 0 5 ID8 0 > however original output shall be Elder1$age[Elder1$age==""]<-NA Elder1$age<-as.numeric(as.character(Elder1$age)) Elder1$age[is.na(Elder1$age)]<-0 Elder1 ID age 1 ID1 38 2 ID2 35 3 ID3 0 4 ID6 0 5 ID8 0 > It is up to the OP to understand what age = 0 means. Regards Petr > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of John Sorkin > Sent: Monday, January 20, 2014 3:07 PM > To: r-help@r-project.org; ecoking...@yahoo.co.in > Subject: Re: [R] how to replace <NA> values > > I hope the code below will show you how to co what you want to do. > John > > Elder1 <- data.frame( > ID=c("ID1","ID2","ID3","ID6","ID8"), > age=c(38,35,"",NA,NA)) > Elder1 > # The age variable is a factor, we want it to be numeric > class(Elder1[,'age']) > # Convert factor to a numeric value. > Elder1$age<-as.numeric(Elder1[,'age']) > # Below you will see how you can test a value to see if it is NA. > is.na(Elder1[,'age']) > # Replace the NA values with a zero. > Elder1[is.na(Elder1[,'age']),"age"]<-0 > # The final data frame with NAs replaced by zeros. > Elder1 > > > > John David Sorkin M.D., Ph.D. > Professor of Medicine > Chief, Biostatistics and Informatics > University of Maryland School of Medicine Division of Gerontology and > Geriatric Medicine Baltimore VA Medical Center 10 North Greene Street > GRECC (BT/18/GR) Baltimore, MD 21201-1524 > (Phone) 410-605-7119 > (Fax) 410-605-7913 (Please call phone number above prior to faxing) > >>> kingsly <ecoking...@yahoo.co.in> 01/19/14 3:01 PM >>> > Dear R community > > I have a large data set contain some empty cells. Because of that, may > be I am wrong, <NA> values are produced. > Now I want replace both empty and <NA> values with zero. > > Elder1 <- data.frame( > ID=c("ID1","ID2","ID3","ID6","ID8"), > age=c(38,35,"",NA,NA)) > Output I am expecting > > ID age > ID1 38 > ID2 35 > ID3 0 > ID6 0 > ID8 0 > > In advance I thank your help. > > > > -- > View this message in context: http://r.789695.n4.nabble.com/how-to- > replace-NA-values-tp4683831.html > Sent from the R help mailing list archive at Nabble.com. > [[alternative HTML version deleted]] > > > > Confidentiality Statement: > This email message, including any attachments, is for the sole use of > the intended recipient(s) and may contain confidential and privileged > information. Any unauthorized use, disclosure or distribution is > prohibited. 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