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Re: st: mata conformability error, but matrices are conformable


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: mata conformability error, but matrices are conformable
Date   Sat, 8 May 2010 00:19:25 -0700 (PDT)

--- On Sat, 8/5/10, Misha Spisok wrote:
> I am getting the following error due to some code I have
> written (given below with complete, but short, working example to
> reproduce the error):

The changed code below works:

*-------------------- begin code --------------------
program calcp, rclass  
    version 10.1
    syntax varlist [if] [in]
    marksample touse
    
    gettoken lhs rhs : varlist
    
    regress `lhs' `rhs' if `touse'
    mata: makexb("`rhs'", "`touse'")
end

mata:
void makexb(string scalar rhs, string scalar touse)
    {
        real matrix X 
        real rowvector b 
        real colvector Xb
        real scalar idx
		
        X = st_data(., tokens(rhs))
        X = X, J(rows(X), 1, 1)
        b = st_matrix("e(b)")
        Xb = X*b'
        idx = st_addvar("float", "Xb")
        st_store(., idx, Xb)
    }
end
*------------------ end code -------------------------

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------





      

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