Is there a function to get a string without a pair of quotes around it?
I have several expressions like:
glm(V12 ~ V3, family=binomial, data=df1)
glm(V12 ~ V4, family=binomial, data=df1)
...
glm(V12 ~ V8, family=binomial, data=df1)
As you can see, the only differences among them are V3 ... V8.
Because sometimes several of these expressions are performed many times,
I want to use a variable "i" to change the V3 ... V8. I did this with:
> i <- 3:8
> glm(V12 ~ paste("V", i, sep=""), family=binomial, data=df1)
However, it seems the paste always returns a variable name with a pair
of quotes, which were wrong in such condition.
I only find a function "sQuote" to add quotes to a string, and it looks
I am looking for an opposite function of it.
Any advice will be appreciated.
How to remove the double or single quote from a string (unquote?)?
3 messages · JingJiang Yan, Gerrit Eichner, Allan Engelhardt
Hi, Jing Jiang, maybe as.formula( paste( "V12 ~ V", i, sep = "")) inside the call to glm() does what you need. Hth -- Gerrit
On Tue, 19 Apr 2011, JingJiang Yan wrote:
Is there a function to get a string without a pair of quotes around it? I have several expressions like: glm(V12 ~ V3, family=binomial, data=df1) glm(V12 ~ V4, family=binomial, data=df1) ... glm(V12 ~ V8, family=binomial, data=df1) As you can see, the only differences among them are V3 ... V8. Because sometimes several of these expressions are performed many times, I want to use a variable "i" to change the V3 ... V8. I did this with:
i <- 3:8
glm(V12 ~ paste("V", i, sep=""), family=binomial, data=df1)
However, it seems the paste always returns a variable name with a pair of quotes, which were wrong in such condition. I only find a function "sQuote" to add quotes to a string, and it looks I am looking for an opposite function of it. Any advice will be appreciated.
______________________________________________ R-help at 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.
--------------------------------------------------------------------- Dr. Gerrit Eichner Mathematical Institute, Room 212 gerrit.eichner at math.uni-giessen.de Justus-Liebig-University Giessen Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany Fax: +49-(0)641-99-32109 http://www.uni-giessen.de/cms/eichner
This should be a FAQ: you are confusing the value with its printed
representation. Try
print(paste("V", 3:8, sep=""), quote=FALSE)
to see that there are no quotes, and you may want to read up on
help("as.formula", package="stats") which has the examples you are
searching for.
Allan
On 18/04/11 17:38, JingJiang Yan wrote:
Is there a function to get a string without a pair of quotes around it? I have several expressions like: glm(V12 ~ V3, family=binomial, data=df1) glm(V12 ~ V4, family=binomial, data=df1) ... glm(V12 ~ V8, family=binomial, data=df1) As you can see, the only differences among them are V3 ... V8. Because sometimes several of these expressions are performed many times, I want to use a variable "i" to change the V3 ... V8. I did this with:
i <- 3:8
glm(V12 ~ paste("V", i, sep=""), family=binomial, data=df1)
However, it seems the paste always returns a variable name with a pair of quotes, which were wrong in such condition. I only find a function "sQuote" to add quotes to a string, and it looks I am looking for an opposite function of it. Any advice will be appreciated.
______________________________________________ R-help at 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.