Hello, I would like to do something like the following: t(y) - FF %*% t(theta) where y is a multiple time series, FF and theta are matrices. Unfortunately, this doesn't work. Using unclass(y) allows me to take the transpose, but when trying to take the difference I get the error "invalid time series parameters specified", I guess due to the fact that t(unclass(y)) has still a tsp attribute. The following works: t(matrix(y,NROW(y),NCOL(y))) - FF %*% t(theta) But I was wondering if there is an easier way... Thanks, Giovanni -- __________________________________________________ [ ] [ Giovanni Petris GPetris at uark.edu ] [ Department of Mathematical Sciences ] [ University of Arkansas - Fayetteville, AR 72701 ] [ Ph: (479) 575-6324, 575-8630 (fax) ] [ http://definetti.uark.edu/~gpetris/ ] [__________________________________________________] -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._