Re: [R] factor levels numeric values
Hi, Suppose your data frame is called data and the name of the factor column is named tobeConverted. I have tried this and it worked. Hope this helps. as.numeric(as.character(data$tobeConverted)) -- View this message in context: http://r.789695.n4.nabble.com/factor-levels-numeric-values-tp4699515p4703090.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] factor levels numeric values
Hi everybody, I have another question (to which I could not find an answer in my r-books. I am sure, it's not a great issue, but I simply lack of a good idea how to solve this: One of my variables gets imported as a factor instead of a numeric variable. Now I have a... Factor w/ 63 levels 0,0.02,0.03,..: 1 NA NA 1 NA NA 1 1 53 10 ... How can I transform these factor levels into actual values? Thank you very much for any help! David [[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.
Re: [R] factor levels numeric values
Hello, David, take a look at the beginning of the Warning section of ?factor. Hth -- Gerrit Hi everybody, I have another question (to which I could not find an answer in my r-books. I am sure, it's not a great issue, but I simply lack of a good idea how to solve this: One of my variables gets imported as a factor instead of a numeric variable. Now I have a... Factor w/ 63 levels 0,0.02,0.03,..: 1 NA NA 1 NA NA 1 1 53 10 ... How can I transform these factor levels into actual values? Thank you very much for any help! David [[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. __ 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.
Re: [R] factor levels numeric values
Also look at the Frequently Asked Questions document that comes with your R installation: 7.10 How do I convert factors to numeric? It may happen that when reading numeric data into R (usually, when reading in a file), they come in as factors. If f is such a factor object, you can use as.numeric(as.character(f)) to get the numbers back. More efficient, but harder to remember, is as.numeric(levels(f))[as.integer(f)] In any case, do not call as.numeric() or their likes directly for the task at hand (as as.numeric() or unclass() give the internal codes). - David L Carlson Department of Anthropology Texas AM University College Station, TX 77840-4352 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Gerrit Eichner Sent: Wednesday, November 12, 2014 8:06 AM To: David Studer Cc: r-help@r-project.org Subject: Re: [R] factor levels numeric values Hello, David, take a look at the beginning of the Warning section of ?factor. Hth -- Gerrit Hi everybody, I have another question (to which I could not find an answer in my r-books. I am sure, it's not a great issue, but I simply lack of a good idea how to solve this: One of my variables gets imported as a factor instead of a numeric variable. Now I have a... Factor w/ 63 levels 0,0.02,0.03,..: 1 NA NA 1 NA NA 1 1 53 10 ... How can I transform these factor levels into actual values? Thank you very much for any help! David [[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. __ 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. __ 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.
Re: [R] factor levels numeric values
I have not completely followed the discussion, so excuse me if it was already pointed out. If numeric data are read as factors, this means that there are not only numeric data in the column. It could be an empty space somewhere, or some character that should be NA, or... I think it is worth spending some time searching for the typo so that the file will be read correctly in R. HTH, Ivan -- Ivan Calandra, ATER University of Reims Champagne-Ardenne GEGENA² - EA 3795 CREA - 2 esplanade Roland Garros 51100 Reims, France +33(0)3 26 77 36 89 ivan.calan...@univ-reims.fr https://www.researchgate.net/profile/Ivan_Calandra Le 12/11/14 15:56, David L Carlson a écrit : Also look at the Frequently Asked Questions document that comes with your R installation: 7.10 How do I convert factors to numeric? It may happen that when reading numeric data into R (usually, when reading in a file), they come in as factors. If f is such a factor object, you can use as.numeric(as.character(f)) to get the numbers back. More efficient, but harder to remember, is as.numeric(levels(f))[as.integer(f)] In any case, do not call as.numeric() or their likes directly for the task at hand (as as.numeric() or unclass() give the internal codes). - David L Carlson Department of Anthropology Texas AM University College Station, TX 77840-4352 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Gerrit Eichner Sent: Wednesday, November 12, 2014 8:06 AM To: David Studer Cc: r-help@r-project.org Subject: Re: [R] factor levels numeric values Hello, David, take a look at the beginning of the Warning section of ?factor. Hth -- Gerrit Hi everybody, I have another question (to which I could not find an answer in my r-books. I am sure, it's not a great issue, but I simply lack of a good idea how to solve this: One of my variables gets imported as a factor instead of a numeric variable. Now I have a... Factor w/ 63 levels 0,0.02,0.03,..: 1 NA NA 1 NA NA 1 1 53 10 ... How can I transform these factor levels into actual values? Thank you very much for any help! David [[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. __ 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. __ 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. __ 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.
Re: [R] factor levels numeric values
Another approach is to re-import your data using options that do not put the data into a factor in the first place. For example you can use the colClasses parameter in the read.table family of functions to specify numeric for that column. If you need to give special handling to that column anyway (using strong functions) then you can use the stringsAsFactors=FALSE or as.is=TRUE parameter settings and avoid the as.character() band-aid in your code. --- Jeff NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --- Sent from my phone. Please excuse my brevity. On November 12, 2014 6:56:11 AM PST, David L Carlson dcarl...@tamu.edu wrote: Also look at the Frequently Asked Questions document that comes with your R installation: 7.10 How do I convert factors to numeric? It may happen that when reading numeric data into R (usually, when reading in a file), they come in as factors. If f is such a factor object, you can use as.numeric(as.character(f)) to get the numbers back. More efficient, but harder to remember, is as.numeric(levels(f))[as.integer(f)] In any case, do not call as.numeric() or their likes directly for the task at hand (as as.numeric() or unclass() give the internal codes). - David L Carlson Department of Anthropology Texas AM University College Station, TX 77840-4352 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Gerrit Eichner Sent: Wednesday, November 12, 2014 8:06 AM To: David Studer Cc: r-help@r-project.org Subject: Re: [R] factor levels numeric values Hello, David, take a look at the beginning of the Warning section of ?factor. Hth -- Gerrit Hi everybody, I have another question (to which I could not find an answer in my r-books. I am sure, it's not a great issue, but I simply lack of a good idea how to solve this: One of my variables gets imported as a factor instead of a numeric variable. Now I have a... Factor w/ 63 levels 0,0.02,0.03,..: 1 NA NA 1 NA NA 1 1 53 10 ... How can I transform these factor levels into actual values? Thank you very much for any help! David [[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. __ 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. __ 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. __ 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.
