Solved! Thanx to Vincent Calcagno: /Dear Machteld, In the coming 2.0 version of glmulti, there will be a more proper way to force variables in. In the current version, it has to be done ad-hoc, and you did it well. The 'formulas' only show terms that are shuffled by glmulti; the constant terms are always there but they do not show up. To make sure of this, get the fitted model objects themselves (output@objects[[1]] for instance) and print their summary: they will include the forced variable in their formula.
Best wishes, Vincent/ Also possible with the coef(object) call. ----- Machteld Vandecandelaere University of Leuven - Centre for Educational Effectiveness and Evaluation Dekenstraat 2, box 3773 – room VHI 2.43 B-3000 Leuven Tel: + 0032 16 325 780 E-mail: [email protected] URL: http://ppw.kuleuven.be/o_en_o/COE -- View this message in context: http://r.789695.n4.nabble.com/Package-glmulti-Include-a-variable-in-ALL-models-tp4648849p4648890.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ [email protected] 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.

