st: matrix product in stata after mvprobit

["stata_user stata_user" <stata_dofile@hotmail.co.uk>]

Hi,

I am using mvprobit (with 3 binary variables), I got the estimate parameter, 
I am looking for a way to compute x' b1,  x' b2  and x' b3 , with x is a 
vector of my predictors (at their mean values), and b1, b2 ,b3 are  the 
vectors of my estimates from the regression model.

How to generate the vector x like with the R package, and then use the beta 
coefficients to get the values x' b1,  x' b2,   x' b3  ?

I will use x' b1 , x' b2, x' b3 to compute the probabilities using mvnp of 
Cappellari & Jenkins.

Thanks for your help.

Sami

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