> hello
> 


> I've tried to simulate a normal law, like that :
> 
> X1 = c(rnorm(90,50,5583),rnorm(160,1198,13034597),rnorm(40,13,125))
> 
> 
> then, I've regressed my ordinal polytomic variable "rating"


        rating=c(rep(2,90),rep(3,160), rep(4,40))
        rating = as.factor(rating)
        rating = as.ordered(rating)
        (ratins is an ordered factor)



  on the continuous variable X1 like that



> library(MASS)
> test2 = polr(rating ~ X1, method = c("probit"))
> summary(test2)
> 
> 
> but R indicates me the following error whereas X does not have infinite 
> or missing values?
> 
> 
> Re-fitting to get Hessian
> Error in svd(X) : infinite or missing values in x
> 
> THANKS
> good by

abdelhafid berrichi
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