these are based on gnuplot 3.5 which has new line styles for latex

  } GPFAR LATEX_lines[] = {
      {0.4, 0.0},			/* thin solid line */
      {0.4, 5.0},			/* thin dotted line */
      {0.8, 0.0},			/* thick solid line */
      {1.0, 5.0},			/* thick dotted line */
      {1.2, 0.0},			/* Thick solid line */
      {1.0, 10.0},			/* thick widely dotted line */
  };
