SPSS® 12.0 Command Syntax Reference

68 Universals
XDATE.WEEK(arg) Return the week number of a date. The result is an integer between 1
and 53. The date must have occurred after October 14, 1582. For
example, you can extract the week number from BIRTHDAY, as in
COMPUTE WEEKNUM=XDATE.WEEK(BIRTHDAY).
When the value for BIRTHDAY is 5-DEC-1954 05:30:15, this command
returns the value 49 for WEEKNUM.
XDATE.TDAY(arg) Return number of days in a time interval or from October 14, 1582.
The value returned is an integer (the fractional portion of a day is ignored).
For example, the command
COMPUTE NDAYS=XDATE.TDAY(BIRTHDAY).
returns the value 135922 when the value for BIRTHDAY is 05-DEC-1954
5:30:15, indicating the number of days between October 14, 1582 and
December 5, 1954. The hours, minutes, and seconds are ignored.
XDATE.TIME(arg) Return time of day from a date. The result is expressed as the number
of elapsed seconds since midnight of that date. For example, when the
value for BIRTHDAY is 05-DEC-1954 5:30:15, the command
COMPUTE ELSEC=XDATE.TIME(BIRTHDAY).
returns the value 19815 for ELSEC. If you provide a TIME print format,
as in
PRINT FORMAT ELSEC(TIME8).
the value is displayed as 5:30:15.
XDATE.DATE(arg) Return the date portion of a date. The result is the integral date portion
of a date, which is the number of elapsed seconds between midnight
October 14, 1582 and midnight of the date in question. The date must
have occurred after October 14, 1582. To extract the date from variable
BIRTHDAY, use
COMPUTE BRTHDATE=XDATE.DATE(BIRTHDAY).
The value for BIRTHDATE can then be displayed as 12/05/54 using
ADATE8 format.