data = (
{
  class = "mpdf_harness";
  mpdf = {
    class = "mepdf";
    epdf = {
      class = "enorm<ldmat>";
      mu = [ 1.1, -1.0 ];
      R = ( "matrix", 2, 2, [ 1.0, -0.5, -0.5, 2.0 ] );
      rv : 
      {
	class = "RV";
	names = ( "x", "y" );
      };
    };
  };
  cond = [ 1.5, 1.7 ];
  mean = [ 1.1, -1.0 ];
  R = ( "matrix", 2, 2, [ 1.0, -0.5, -0.5, 2.0 ] );
  tolerance = 0.1;
  variance = [ 0.3, 0.3 ];
} );