Re: st: mata optimize problem

[Stas Kolenikov <skolenik@gmail.com>]

set matalnum on

to see which line of your procedure generates the error. To make your
program well defended against bad inputs, you can code something like

if ( cols(A_inv) != rows( X ) ) {
  printf( "{err}A_inv is not conformant to X"\n)
  lndensity[,] = J( rows(lndensity), 1, . )
  return
}

Note also that your observations lie on the straight line x==y. A more
sensible set of values might have been

gen xcoor = uniform()
gen ycoor = uniform()

producing points distribution U[0,1]^2.