PLEASE! You already sent this to R-help .. which makes sense ..
do *NOT* send such questions to other mailing lists, like 'R-SIG-robust' to which it really does *not* belong. Martin Maechler, ETH Zurich >>>>> "AC" == Anwesha Chakrabarti <c.anwe...@gmail.com> >>>>> on Tue, 18 Aug 2009 13:54:32 +0530 writes: AC> Hi I was trying to estimate simultaneous equation system AC> in R using systemfit. I used the following commands >> library(systemfit) data(Kmenta) attach(Kmenta) >> eqDemand<-consump~price+income >> eqSupply<-consump~price+farmprice+trend >> fitsur<-systemfit("SUR",list(demand=eqDemand, >> supply=eqSupply)) AC> and got the following error messege AC> Error in systemfit("SUR", list(demand = eqDemand, supply AC> = eqSupply)) : argument 'formula' must be an object of AC> class 'formula' or a list of objects of class 'formula' AC> Can anyone tell me how to overcome this problem? AC> regards AC> Anwesha AC> [[alternative HTML version deleted]] AC> _______________________________________________ AC> R-SIG-Robust@r-project.org mailing list AC> https://stat.ethz.ch/mailman/listinfo/r-sig-robust _______________________________________________ R-SIG-Robust@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-robust