The first idea works perfect. Thank you!.
El mié., 5 jun. 2019 a las 1:07, peter dalgaard (<pda...@gmail.com>) escribió: > Two ideas: > > nn <- names(wageszm14) > lvadd <- nn[grep("^lvacb", nn)] > > or > > lvadd <- paste0("lvacb", 23:81) > lvadd <- lvadd[lvadd %in% names(wageszm14)] > > > On 5 Jun 2019, at 06:46 , Rolando I. Valdez via R-help < > r-help@r-project.org> wrote: > > > > Hello, > > > > I have almost 40 variables that I am trying to include in a formula. > > > > I tried to include them using as.formula(), however the variables do not > > follow a patter in the name. e.g. These variables are named like: lvacb23 > > lvacb30 lvacb300 lvacb40 ..... lvacb81. > > > >> lvadd <- paste0("lvacb", 23:81) > >> (fmla <- as.formula(paste("lwage ~ ", paste(lvadd, collapse = "+")))) > >> fit <- lm(fmla, data = wageszm14) > > Error in eval(predvars, data, env) : object 'lvacb24' not found > > > > The variable lvacb24 doesn't exist, because from lvacb23 it jumps to > > lvacb30. > > > > Thanks in advance for any help. > > -- > > Rolando Valdez > > Facultad de Economía y Relaciones Internacionales > > Universidad Autónoma de Baja California > > > > [[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. > > -- > Peter Dalgaard, Professor, > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Office: A 4.23 > Email: pd....@cbs.dk Priv: pda...@gmail.com > > > > > > > > > > -- Rolando Valdez Facultad de Economía y Relaciones Internacionales Universidad Autónoma de Baja California [[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.