In addition to what Jim and Jeff said, I would suggest trying this: tmp <- is.na(V) ## then head(Mac$TOTALFRT[tmp]) ## or head( V[tmp] )
This will show you the first few rows of the values which you think should be numeric but are not. Hopefully, you will be able to see why they are not numeric. Perhaps, as Jim suggested, they contain commas, which are not considered numeric. I¹d also suggest Mac <- read.csv("July'15.csv", header = TRUE, stringsAsFactors=FALSE) While you are trying to solve this problem. This is because you said TOTALFRT is showing as character, in which case there should be no need to use as.character(Mac$TOTALFRT). -- Don MacQueen Lawrence Livermore National Laboratory 7000 East Ave., L-627 Livermore, CA 94550 925-423-1062 On 8/26/15, 1:30 AM, "R-help on behalf of Arun84441" <r-help-boun...@r-project.org on behalf of arun.kum...@safexpress.com> wrote: >I have imported the csv file having 398800 obs of 30 variables. There is a >variable "TOTALFRT" which is showing as character in R environment. I am >trying to convert it to numeric by using as.numeric function. >Wherein function is converting character to numeric but with an error >message "Warning message: >NAs introduced by coercion", it omitted 388800 entries. Hence I am unable >to >perform calculation. > >Is there anyway by which I can convert NAs to numeric?? > >Below is the code I used for conversion :- > >Mac<-read.csv("July'15.csv", header = TRUE) >Book=as.character(Mac$TOTALFRT) >V = as.numeric(Book) > > > > > > > >-- >View this message in context: >http://r.789695.n4.nabble.com/Convert-character-Variables-to-numeric-tp471 >1518.html >Sent from the R help mailing list archive at Nabble.com. > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.