Re: [R] Problem with ordered probit model in MASS

2007-01-25 Thread David Duffy
Justin Bem wrote: > I got this message, while using the polr function in MASS > > Error in polr(EQ, don, subset = (cote != 0), method = "probit", na.action = > na.omit) : > attempt for find suitable starting values failed > > how can I initialise starting values ? You might try running

Re: [R] Problem with ordered probit model in MASS

2007-01-24 Thread Prof Brian Ripley
On Wed, 24 Jan 2007, justin bem wrote: (Again: this is a duplicate post.) Dear all, I got this message, while using the polr function in MASS EQ<-as.formula("dep~fpta+tcdv+cdta+cmta+prcd+patc+lactifs+excta") Estim<-polr(EQ,don, subset=(cote!=0),method="probit",na.action=na.omit) Error in p

[R] Problem with ordered probit model in MASS

2007-01-24 Thread justin bem
Dear all, I got this message, while using the polr function in MASS >EQ<-as.formula("dep~fpta+tcdv+cdta+cmta+prcd+patc+lactifs+excta") > Estim<-polr(EQ,don, subset=(cote!=0),method="probit",na.action=na.omit) Error in polr(EQ, don, subset = (cote != 0), method = "probit", na.action = na.omit) :

[R] Problem with ordered probit model in MASS

2007-01-23 Thread justin bem
Dear all, I got this message, while using the polr function in MASS >EQ<-as.formula("dep~fpta+tcdv+cdta+cmta+prcd+patc+lactifs+excta") > Estim<-polr(EQ,don, subset=(cote!=0),method="probit",na.action=na.omit) Error in polr(EQ, don, subset = (cote != 0), method = "probit", na.action = na.omit) :