hi brennan, survey design objects can be subsetted with the same subset() syntax as data.frame objects, so following jeff's advice maybe you want
svyglm( formula , design = subset( surveydesign , variable %in% c( 'value a' , 'value b' ) ) ) for some examples of how to construct a survey design with public use data, see http://github.com/ajdamico/usgsd On Wed, Feb 11, 2015 at 11:49 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > This seems like a fundamental misunderstanding on your part of how > operators, and in particular logical expressions, work in computer > languages. Consider some examples: > > 1+2 has a numeric answer because 1 and 2 are both numeric. > 1+"a" has at the very least not a numeric answer because the values on > either side of the "+" sign are not both numeric. > TRUE | FALSE has a logical type of answer because both sides of the > logical "or" operator are logical. > However, you are expressing something like > TRUE | "a string" which might mean something but that something generally > is not a logical type of answer. > > Try > variable=="value a" | variable=="value b" > or > variable %in% c( "value a", "value b" ) > > You would probably find that the Introduction to R document that comes > with R has some enlightening examples in it. You might also find Pat Burns' > "The R Inferno" entertaining as well (search for it in your favorite search > engine). > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live > Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > On February 11, 2015 8:42:58 PM EST, Brennan O'Banion < > brennan.oban...@gmail.com> wrote: > >I am aware that it is possible to specify a subset with a single > >logical operator when constructing a model, such as: > >svyglm(formula, design=data, subset=variable=="value"). > > > >What I can't figure out is how to specify a subset with two or more > >logical operators: > >svyglm(formula, design=data, subset=variable=="value a"|"value b"). > > > >Is it possible to specify a subset in this way using *glm without > >having to, in my case, subset the original data, create a survey > >design, and then fit a model? > > > >______________________________________________ > >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > >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 -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
