how to report list of subjects who's visiting dates are continuously missing

[maddy_sameer]

Data visit;

Input Subid Visitno Date: Date9. ;

Format Date Date9.;

Cards:

101     1     20jan2008

101     2     30jan2008

101     3     12feb2008

102     1     22jan2008

102     2     .

102     3     .

103     1     24jan2008

103     2     12feb2008

103     3     .

104     1     .

104     2     13feb2008

104     3     18feb2008

run;

[TomKari]

Do you mean having two visits in a row missing (case 102), or all visits missing (you don't have a case for this).

Tom