Re: [R] lower/upper case question
toupper() and tolower()
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of Erin Hodgess
Sent: Friday, December 17, 2010 4:10 PM
To: R help
Subject: [R] lower/upper case question
Dear R People:
Is there a function to convert a character string to all uppercase or
all lowercase please?
I'm sure that I've used one before but I'm drawing a blank.
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences University of Houston -
Downtown
mailto: erinm.hodg...@gmail.com
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[R] lower/upper case question
Dear R People: Is there a function to convert a character string to all uppercase or all lowercase please? I'm sure that I've used one before but I'm drawing a blank. Thanks, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodg...@gmail.com __ 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] lower/upper case question
See ?toupper for the toupper, tolower, chartr, and casefold functions. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- project.org] On Behalf Of Erin Hodgess Sent: Friday, December 17, 2010 2:10 PM To: R help Subject: [R] lower/upper case question Dear R People: Is there a function to convert a character string to all uppercase or all lowercase please? I'm sure that I've used one before but I'm drawing a blank. Thanks, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodg...@gmail.com __ 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] lower/upper case question
Also, gsub() can change the case of part a string -- use perl=TRUE and \\U or \\L (and perhaps \\E) in the replacement string. E.g., capitalize color names with gsub(paste(sep=, (, paste(colors(),collapse=|), )), \\U\\1, The quick red Fox jumped over the lazy brown Dog, perl=TRUE) [1] The quick RED Fox jumped over the lazy BROWN Dog Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Greg Snow Sent: Friday, December 17, 2010 1:19 PM To: Erin Hodgess; R help Subject: Re: [R] lower/upper case question See ?toupper for the toupper, tolower, chartr, and casefold functions. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- project.org] On Behalf Of Erin Hodgess Sent: Friday, December 17, 2010 2:10 PM To: R help Subject: [R] lower/upper case question Dear R People: Is there a function to convert a character string to all uppercase or all lowercase please? I'm sure that I've used one before but I'm drawing a blank. Thanks, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodg...@gmail.com __ 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] lower/upper case question
On Fri, Dec 17, 2010 at 4:38 PM, William Dunlap wdun...@tibco.com wrote: Also, gsub() can change the case of part a string -- use perl=TRUE and \\U or \\L (and perhaps \\E) in the replacement string. E.g., capitalize color names with gsub(paste(sep=, (, paste(colors(),collapse=|), )), \\U\\1, The quick red Fox jumped over the lazy brown Dog, perl=TRUE) [1] The quick RED Fox jumped over the lazy BROWN Dog Nice example. Here are two ways to do it with gsubfn: library(gsubfn) phrase - The quick red Fox jumped over the lazy brown Dog # 1 gsubfn(\\w+, ~ if (tolower(x) %in% colors()) toupper(x) else x, phrase) # 2 # Colors is a list with lower case values and upper case names # Unlike the last one this will not capitalize mixed case, only lower Colors - as.list(setNames(toupper(colors()), colors())) gsubfn(\\w+, Colors, phrase) -- Statistics Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com __ 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.
