Hi Henrique, Thanks for your reply. I tried you suggestion but it didn't work with the poLCA package.
Maybe i didn't express myself good. The normal syntax is: f <- cbind(V1,V2,V3)~1 poLCA(f,data) and what I wanna do is kind of use an expression to automatically generate the "V1,V2,V3" argument of the "cbind expression" via "names(data)" to assign it to f , so that later the poLCA command uses my "f" expression the same way if I had put in V1,V2,V3 manually. Greetings Jürgen I think the problem is that in cbind need arguments of non character type, seperated by commas Henrique Dallazuanna schrieb: > I don't understand the cbind(bi) sintax, but you can do this with the > folowing: > (Using iris data from R) > > form <- formula(paste(paste(names(iris), collapse = " + "), "~ 1")) > > 2009/9/8 "Biedermann, Jürgen" <juergen.biederm...@charite.de > <mailto:juergen.biederm...@charite.de>> > > Hi there, > > I have the following problem: > > I have a package called "polLCA" which has the following syntax: > > poLCA(formula, data) > > and needs the following formula definition: > > formula <- cbind(V1,V2,V3,...) > > So far so good. > > What I tried now was the following: > #Get "data" with the "read.table" fuction > data <- read.table("d:/ .....) > #Select cols to use in the analysis > aktDat <- data[2:15] > #get the names > names(aktDat) > #put them together in one string, comma as separation sign > bi <- paste(names(aktDat),collapse=",") > #use this string in the "f" function to bind the variables > formula <- cbind(bi)~1 > #Calculate the modell > poLCA(formula, data) > > but this doesn't work: I get the following error message: > > "Warnung in model.matrix.default(formula, mframe) : > variable 'cbind(bi)' converted to a factor" > > Could anyone help me? > Thanks > > Greetings > Jürgen > > ______________________________________________ > R-help@r-project.org <mailto:R-help@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. > > > > > -- > Henrique Dallazuanna > Curitiba-Paraná-Brasil > 25° 25' 40" S 49° 16' 22" O -- Jürgen Biedermann Institut für forensische Psychiatrie Charite Universitätsmedizin Berlin Tel.: 030 8445-1434 Email: juergen.biederm...@charite.de [[alternative HTML version deleted]]
______________________________________________ R-help@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.
