[R] extract a row
Hello there, Using 1.9.0 on WinXP... I have a data frame, one column of which is named rate. The column has text entries like fast, medium, slow, very slow, and so forth. I have not tried to make them factors, but maybe R did this automatically. Anyway, I would like to display on the console rows that meet a rate criterion. So I want to type something like: dataframe[rate==slow] and get back this sort of output: test subject trial rate score 34B27 3 slow 27 55B55 4 slow 34 where test, subject, trial, rate, and score are all the dataframe's columns. How do I do that?? Thanks, =Randy= R. Zelick email: [EMAIL PROTECTED] Department of Biology voice: 503-725-3086 Portland State University fax: 503-725-3888 mailing: P.O. Box 751 Portland, OR 97207 shipping: 1719 SW 10th Ave, Room 246 Portland, OR 97201 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] extract a row
df[ df$rate==slow, ] On Mon, 2004-08-16 at 18:48, Randy Zelick wrote: Hello there, Using 1.9.0 on WinXP... I have a data frame, one column of which is named rate. The column has text entries like fast, medium, slow, very slow, and so forth. I have not tried to make them factors, but maybe R did this automatically. Anyway, I would like to display on the console rows that meet a rate criterion. So I want to type something like: dataframe[rate==slow] and get back this sort of output: test subject trial rate score 34B27 3 slow 27 55B55 4 slow 34 where test, subject, trial, rate, and score are all the dataframe's columns. How do I do that?? Thanks, =Randy= R. Zelick email: [EMAIL PROTECTED] Department of Biology voice: 503-725-3086 Portland State University fax: 503-725-3888 mailing: P.O. Box 751 Portland, OR 97207 shipping: 1719 SW 10th Ave, Room 246 Portland, OR 97201 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] extract a row
The easiest way to do that is subset(dataframe, rate == slow). Please let me know if you have any more questions. Kevin -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Randy Zelick Sent: Monday, August 16, 2004 10:49 AM To: R list server posting Subject: [R] extract a row Hello there, Using 1.9.0 on WinXP... I have a data frame, one column of which is named rate. The column has text entries like fast, medium, slow, very slow, and so forth. I have not tried to make them factors, but maybe R did this automatically. Anyway, I would like to display on the console rows that meet a rate criterion. So I want to type something like: dataframe[rate==slow] and get back this sort of output: test subject trial rate score 34B27 3 slow 27 55B55 4 slow 34 where test, subject, trial, rate, and score are all the dataframe's columns. How do I do that?? Thanks, =Randy= R. Zelick email: [EMAIL PROTECTED] Department of Biology voice: 503-725-3086 Portland State University fax: 503-725-3888 mailing: P.O. Box 751 Portland, OR 97207 shipping: 1719 SW 10th Ave, Room 246 Portland, OR 97201 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
