Hello Marc >>Can you add a DayOfWeek(t) which returns a number 0 to 6, with 0=Sunday, >>1=Monday, etc.
ISO 8601 defines a week date see http://en.wikipedia.org/wiki/ISO_week_date http://en.wikipedia.org/wiki/ISO_week_date Sunday has to be 7 to comply with ISO 8601 and to allow correct sorting. >>Personally, I prefer the way that Excel and many other packages model >>time: It is the number of days (as a 64-bit "real" number) from some >>base time, so 0.5 represents 12 hours from the base time. It makes >>differences very easy to calculate. Calculating with seconds instead of days is not more difficult but avoids rounding errors. Anyway the SI unit of time is seconds. Best regards Xypron -- View this message in context: http://www.nabble.com/Time-conversion-functions-tp20549985p20616523.html Sent from the Gnu - GLPK - Help mailing list archive at Nabble.com. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
