Re: [R] Extracting the name of an object into a character string and vice versa
On Dec 12, 2008, at 8:41 AM, Gabor Grothendieck wrote: Its a FAQ: http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-turn-a-string-into-a-variable_003f On Fri, Dec 12, 2008 at 8:30 AM, Philip Whittall philip.whitt...@detica.com wrote: I am still struggling to map a character string to an object name and vice versa in R. I thought the as.name() function might work, but observe the following behaviour ... attach(warpbreaks) levels(tension) [1] L M H levels(as.name(tension)) NULL objectname-as.name(tension) objectname tension levels(objectname) NULL So even though it sets up a symbol, this symbol isn't recognised as an object name by functions such as levels(). I need 2 functions, call them A and B such that A(tension) yields the object name tension which is recognised by functions and B(tension) yields the character result tension. I see that your first request was satisfied. Your second one, that for a method to get as a character object the name of an object did not seem to get addressed. If tension is an R object (or a function call), try: ---a vector tension - vector() as.character(bquote(tension)) [1] tension --- a function with no arguments as.character(bquote(ls())) [1] ls --- a function ( in this case the Extract or indexing function) with arguments as.character(bquote(fit$terms)) [1] $ fit terms -- David Winsemius Any suggestions would be greatly appreciated, Philip This message should be regarded as confidential. If you have received this email in error please notify the sender and destroy it immediately. Statements of intent shall only become binding when confirmed in hard copy by an authorised signatory. The contents of this email may relate to dealings with other companies within the Detica Group plc group of companies. Detica Limited is registered in England under No: 1337451. Registered offices: Surrey Research Park, Guildford, Surrey, GU2 7YP, England. [[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] Extracting the name of an object into a character string and vice versa
I am still struggling to map a character string to an object name and vice versa in R. I thought the as.name() function might work, but observe the following behaviour ... attach(warpbreaks) levels(tension) [1] L M H levels(as.name(tension)) NULL objectname-as.name(tension) objectname tension levels(objectname) NULL So even though it sets up a symbol, this symbol isn't recognised as an object name by functions such as levels(). I need 2 functions, call them A and B such that A(tension) yields the object name tension which is recognised by functions and B(tension) yields the character result tension. Any suggestions would be greatly appreciated, Philip This message should be regarded as confidential. If you have received this email in error please notify the sender and destroy it immediately. Statements of intent shall only become binding when confirmed in hard copy by an authorised signatory. The contents of this email may relate to dealings with other companies within the Detica Group plc group of companies. Detica Limited is registered in England under No: 1337451. Registered offices: Surrey Research Park, Guildford, Surrey, GU2 7YP, England. [[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] Extracting the name of an object into a character string and vice versa
Its a FAQ: http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-turn-a-string-into-a-variable_003f On Fri, Dec 12, 2008 at 8:30 AM, Philip Whittall philip.whitt...@detica.com wrote: I am still struggling to map a character string to an object name and vice versa in R. I thought the as.name() function might work, but observe the following behaviour ... attach(warpbreaks) levels(tension) [1] L M H levels(as.name(tension)) NULL objectname-as.name(tension) objectname tension levels(objectname) NULL So even though it sets up a symbol, this symbol isn't recognised as an object name by functions such as levels(). I need 2 functions, call them A and B such that A(tension) yields the object name tension which is recognised by functions and B(tension) yields the character result tension. Any suggestions would be greatly appreciated, Philip This message should be regarded as confidential. If you have received this email in error please notify the sender and destroy it immediately. Statements of intent shall only become binding when confirmed in hard copy by an authorised signatory. The contents of this email may relate to dealings with other companies within the Detica Group plc group of companies. Detica Limited is registered in England under No: 1337451. Registered offices: Surrey Research Park, Guildford, Surrey, GU2 7YP, England. [[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.
