Re: [R] Creating a column based on data in another column
Hey guys, I have the same question, except in reverse: if we had letter classifications and wanted to assign numerical values to them (the case I stated previously except the other way around) how would we do that? I am trying to use the recode function in the car package but not having any luck.. Thank you!! On Fri, Jul 31, 2009 at 12:04 PM, Mehdi Khan mwk...@ucdavis.edu wrote: hello all, I have a data frame and I want to create a column which assigns a letter based upon the value in another column. The data column has velocities ranging from 0 to 1000. So for example, for velocities between 0 and 300 I'd like to assign the letter A in the new column, for 300-600, B and so on and so forth. How would I do this? Thank you very much! Mehdi Khan [[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] Creating a column based on data in another column
willsclahanstationcut$wills.vs30- recode(willsclahanstationcut$area.VSCAT,c(B=686,C= 464,BC= 724, D=301,CD= 372, D= 800, DE= 1000, WATER=0)) where $vs30 is the column I want to create, $area.VSCAT is the column which contains the labels. On Wed, Aug 12, 2009 at 8:46 PM, Mehdi Khan mwk...@ucdavis.edu wrote: Hey guys, I have the same question, except in reverse: if we had letter classifications and wanted to assign numerical values to them (the case I stated previously except the other way around) how would we do that? I am trying to use the recode function in the car package but not having any luck.. Thank you!! On Fri, Jul 31, 2009 at 12:04 PM, Mehdi Khan mwk...@ucdavis.edu wrote: hello all, I have a data frame and I want to create a column which assigns a letter based upon the value in another column. The data column has velocities ranging from 0 to 1000. So for example, for velocities between 0 and 300 I'd like to assign the letter A in the new column, for 300-600, B and so on and so forth. How would I do this? Thank you very much! Mehdi Khan [[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] Creating a column based on data in another column
Dear Medhi, Take a look at ?cut or ?recode (in the car package). HTH, Jorge On Fri, Jul 31, 2009 at 3:04 PM, Mehdi Khan wrote: hello all, I have a data frame and I want to create a column which assigns a letter based upon the value in another column. The data column has velocities ranging from 0 to 1000. So for example, for velocities between 0 and 300 I'd like to assign the letter A in the new column, for 300-600, B and so on and so forth. How would I do this? Thank you very much! Mehdi Khan [[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. [[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] Creating a column based on data in another column
have a look at ?cut(); for instance, x - sample(1000, 20, TRUE) x cut(x, c(0, 300, 600, 1000), c(A, B, C)) I hope it helps. Best, Dimitris Mehdi Khan wrote: hello all, I have a data frame and I want to create a column which assigns a letter based upon the value in another column. The data column has velocities ranging from 0 to 1000. So for example, for velocities between 0 and 300 I'd like to assign the letter A in the new column, for 300-600, B and so on and so forth. How would I do this? Thank you very much! Mehdi Khan [[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. -- Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014 __ 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] Creating a column based on data in another column
Try this:
cut(sample(0:1000, 100), breaks = c(0, 300, 600, 900, 1000), labels = c('A',
'B', 'C', 'D'))
On Fri, Jul 31, 2009 at 4:04 PM, Mehdi Khan mwk...@ucdavis.edu wrote:
hello all,
I have a data frame and I want to create a column which assigns a letter
based upon the value in another column. The data column has velocities
ranging from 0 to 1000. So for example, for velocities between 0 and 300
I'd like to assign the letter A in the new column, for 300-600, B and
so
on and so forth. How would I do this?
Thank you very much!
Mehdi Khan
[[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.
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40 S 49° 16' 22 O
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Creating a column based on data in another column
got it, thank you everyone! On Fri, Jul 31, 2009 at 12:04 PM, Mehdi Khan mwk...@ucdavis.edu wrote: hello all, I have a data frame and I want to create a column which assigns a letter based upon the value in another column. The data column has velocities ranging from 0 to 1000. So for example, for velocities between 0 and 300 I'd like to assign the letter A in the new column, for 300-600, B and so on and so forth. How would I do this? Thank you very much! Mehdi Khan [[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.
