That's great! But, I guess I should have provided a better example for my problem. The reason being that I did not consider strings. For instance, in my case, I'm actually trying to add a value to a data frame that looks like this:
Obs X 0 NA 1 "01 001" 2 "01 002" 3 "01 003" And I am actually trying to get that specific "NA" value and convert it to "00 000" so it can look like this: Obs X 0 "00 000" 1 "01 001" 2 "01 002" 3 "01 003" When I write the code you provided, I get this result: x[1,"X"]<-"00 000" Warning message: In `[<-.factor`(`*tmp*`, iseq, value = c(NA, 3L, 4L, 5L, 6L, 7L, : invalid factor level, NAs generated I am wondering what I am doing wrong and how to solve this problem. Thanks for all the help! Carlos On 6/10/2011 8:34 PM, jholtman [via R] wrote: > you probably need to read the Introduction to R to understand indexing: > > > x > Obs X Y Z > 1 1 1 0 1 > 2 2 0 0 1 > 3 3 1 1 1 > 4 4 0 1 1 > 5 5 1 1 0 > 6 6 0 0 0 > > x[4, "Y"] <- 0 > > x > Obs X Y Z > 1 1 1 0 1 > 2 2 0 0 1 > 3 3 1 1 1 > 4 4 0 0 1 > 5 5 1 1 0 > 6 6 0 0 0 > > > On Fri, Jun 10, 2011 at 5:42 PM, jour4life <[hidden email] > </user/SendEmail.jtp?type=node&node=3589793&i=0>> wrote: > > > Hello all, > > > > I am wondering if there is a way to change the value of one cell in > R. For > > instance let's say I have a hypothetical data frame that looks like > this: > > > > Obs X Y Z > > 1 1 0 1 > > 2 0 0 1 > > 3 1 1 1 > > 4 0 1 1 > > 5 1 1 0 > > 6 0 0 0 > > > > I would like to change the value of the 4th observation in the Y > column from > > 1 to 0. It should look like this: > > > > Obs X Y Z > > 1 1 0 1 > > 2 0 0 1 > > 3 1 1 1 > > 4 0 0 1 > > 5 1 1 0 > > 6 0 0 0 > > > > Is it possible to change the value in one command? > > > > Thanks, > > > > Carlos > > > > > > -- > > View this message in context: > http://r.789695.n4.nabble.com/change-value-in-one-cell-tp3589456p3589456.html > > Sent from the R help mailing list archive at Nabble.com. > > > > ______________________________________________ > > [hidden email] </user/SendEmail.jtp?type=node&node=3589793&i=1> > mailing list > > 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. > > > > > > -- > Jim Holtman > Data Munger Guru > > What is the problem that you are trying to solve? > > ______________________________________________ > [hidden email] </user/SendEmail.jtp?type=node&node=3589793&i=2> > mailing list > 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. > > > ------------------------------------------------------------------------ > If you reply to this email, your message will be added to the > discussion below: > http://r.789695.n4.nabble.com/change-value-in-one-cell-tp3589456p3589793.html > > To unsubscribe from change value in one cell, click here > <http://r.789695.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=3589456&code=am91cjRsaWZlQGdtYWlsLmNvbXwzNTg5NDU2fC0xNjIzNjcwNDM1>. > > -- View this message in context: http://r.789695.n4.nabble.com/change-value-in-one-cell-tp3589456p3590037.html Sent from the R help mailing list archive at Nabble.com. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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.
