Hi, this is a snap shot of my data set.

Code:




Code:


* Example generated by -dataex-. To install: ssc install dataex
clear
input float(id start stop)
  1 625 625
  1 627 629
  1 631 641
  1 644 645
  1 647 653
  1 696   .
  9 682   .
 13 695   .
 17 694 694
 25 662 675
 25 677 678
 25 682   .
 29 634 680
 33 643 661
 33 690   .
 37 657 704
 37 706 710
 41 679   .
 45 707   .
 49 683   .
 53 670   .
 57 696   .
 61 687 693
 61 696   .
 65 634 680
 69 636 649
 73 628 658
 73 676 690
 73 702   .
 81 637 705
 85 638 639
 85 652 703
 89 633 639
 89 641 665
 93 707   .
 97 694   .
100 638 646
100 648 655
100 657 657
100 659 661
100 663 667
100 669 669
100 671 674
100 679 680
100 683 684
end
format %tm start
format %tm stop