"data set 
"transformed by eqn:

"   y=y/x

/sm    ON                  ;data marks
/sc    ON                  ;connect points
/sd    ON                  ;dashed lines
/sb    OFF                 ;bar
/se x  OFF                 ;X-error bars
/se y  OFF                 ;Y-error bars
/td    "xy"                ;define the columns
/sa m  1  2                ;mark, dash & color for column 2
/sa n  1  2                ;mark every 1st pt
  50  0.001278
  99.8  0.00127555
  149.6  0.00127607
  200.6  0.00127617
  250.2  0.00127378
  300.4  0.00127397
  350.2  0.00127213
  400.2  0.00126837