Hello Just add "c()" collector as follows : env <- list(c(0.8,0.9,1.0,1.1,1.2)) Cheers Guillaume -- View this message in context: http://r.789695.n4.nabble.com/Re-newbie-embeding-seq-in-a-list-tp4647884p4647896.html Sent from the R help mailing list archive at Nabble.com.