You have competing non-standard evaluation tools in play. I would decouple them with a function (untested):
my fit <- function( DF ) { data.frame( HOSP_NRD = .$HOSP_NRD[1] , fitHosp = lm(log(y)~ log(x)+I(log(x)^2)+NCHRONIC+AGE+sex , data=DF) ) } dfhosp <- ( dat.2.wide.sub %>% group_by(HOSP_NRD) %>% do( my_fit( . ) ) -- Sent from my phone. Please excuse my brevity. On March 7, 2016 10:48:28 AM PST, Veerappa Chetty <chett...@gmail.com> wrote: >Hi, > >The following call does not work: > >dfhosp=dat.2.wide.sub %>% group_by(HOSP_NRD)%>% > do(fitHosp=lm(log(y)~ log(x)+I(log(x)^2)+NCHRONIC+AGE+sex ,data=.)) > >Error in `$<-.data.frame`(`*tmp*`, "sex", value = integer(0)) : > replacement has 0 rows, data has 25174 > >When I use "sex" as a binary variable with values "0" and "1", it >works. > >Is there a way to use factor in this call? >Thanks. > >V.K.Chetty > >-- >Professor of Family Medicine >Boston University >Tel: 617-414-6221, Fax:617-414-3345 >emails: chett...@gmail.com,vche...@bu.edu > > [[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. [[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.