[R] building a formula string bit by bit ..

Hello, Still a newbie with R, though I have learned a lot from reading this list. I'm hoping someone can help with this question: I have two vectors, one for variables, and one for bits. I want to build a string (really a formula) based on the values in my vector of 1s and 0s in bits. If I

Re: [R] building a formula string bit by bit ..

Hi Esmail, Try this: vars=c('X.1', 'X.2', 'X.3', 'X.4', 'X.5') bits=c(1, 0, 1, 1, 0) paste(vars[which(bits==1)],collapse=+) HTH, Jorge On Tue, May 6, 2008 at 3:06 PM, Esmail Bonakdarian [EMAIL PROTECTED] wrote: Hello, Still a newbie with R, though I have learned a lot from reading this

Re: [R] building a formula string bit by bit ..

Esmail Bonakdarian wrote: Hello, Still a newbie with R, though I have learned a lot from reading this list. I'm hoping someone can help with this question: I have two vectors, one for variables, and one for bits. I want to build a string (really a formula) based on the values in my vector of

Re: [R] building a formula string bit by bit ..

I would actually go with this: bits=c(1, 0, 1, 1, 0) paste(X, which(bits==1), sep=.,collapse=+) No need for the vars variable. Though admittedly it breaks down if bits is identically 0. Haris Skiadas Department of Mathematics and Computer Science Hanover College On May 6, 2008, at 3:11 PM,

Re: [R] building a formula string bit by bit ..

Marc Schwartz wrote: Esmail Bonakdarian wrote: Hello, Still a newbie with R, though I have learned a lot from reading this list. I'm hoping someone can help with this question: I have two vectors, one for variables, and one for bits. I want to build a string (really a formula) based on the

Re: [R] building a formula string bit by bit ..

Jorge Ivan Velez wrote: Hi Esmail, Try this: vars=c('X.1', 'X.2', 'X.3', 'X.4', 'X.5') bits=c(1, 0, 1, 1, 0) paste(vars[which(bits==1)],collapse=+) HTH, Jorge Wow .. that is beautiful :-) .. and exactly what I was looking for (and suspected existed). I ended up doing this: