On 03-10-2010, at 17:24, artur tarassow wrote: > Hi, > > last year the non-linear Wald-Test was implemented. The following > example is given: > > <script> > function restr (matrix *b) > matrix ret = b[1]/b[2] - b[4]/b[5] > return matrix ret > end function > > open data4-10 > ols 1 0 2 3 4 5 > restrict > rfunc = restr > end restrict > </script> > > But running this script yields the error: > ---------------------- > ? restrict > ? rfunc = restr > ? end restrict > Data types not conformable for operation > > Error executing script: halting >> end restrict > ---------------------- > > I am not sure what the exact problem is. According to the Gret reference manual (gretl 1.9.1,page 47) the function restr should be declared as function restr (const matrix b)