Sorry for the delay in responding! Here is a sample of the data: 1 0 0 617.09 0.00 9.38 l 0.0000E+00 2 0 0 7169.00 6978.44 94.10 o 0.1913E-05 3 0 0 366.08 371.91 14.06 o 0.6503E-03 4 0 0 5948.04 5586.09 52.95 o 0.2804E-05 5 0 0 3756.34 3944.63 50.69 o 0.6960E-05 -11 1 0 147.27 93.02 23.25 o 0.1320E-02 -10 1 0 -2.31 5.71 9.57 o 0.2533E-02 I have removed the last two columns just so that the data fit better. Again what I wanted was the first three numbers to be a key to pick out the 5th and 6th numbers in the line