calendar............ (v) calendar for year [months]
returns calendar for year, as a 12 element list
argument is one or more numbers: year, months
If no months are given, it defaults to all months.
example:
calendar 1998 5 6
+---------------------+---------------------+
| May | Jun |
| Su Mo Tu We Th Fr Sa| Su Mo Tu We Th Fr Sa|
| 1 2| 1 2 3 4 5 6|
| 3 4 5 6 7 8 9| 7 8 9 10 11 12 13|
| 10 11 12 13 14 15 16| 14 15 16 17 18 19 20|
| 17 18 19 20 21 22 23| 21 22 23 24 25 26 27|
| 24 25 26 27 28 29 30| 28 29 30 |
| 31 | |
+---------------------+---------------------+
getdate............. (v) get date from character string
form: [opt] getdate string
useful for input forms that have a date entry field
date forms permitted:
1986 5 23
May 23 1986
23 May 1986
and:
opt=0 (days first - default)
23 5 1986
opt=1 (months first)
5 23 1986
other characters allowed: ,-/:
if not given, century defaults to current
only first 3 characters of month are tested.
examples: 23/5/86; may 23, 1986; 1986-5-23
requires: valdate
todate.............. (v) converts day numbers to dates
converts day numbers to dates, converse <todayno>
This conversion is exact and provides a means of
performing exact date arithmetic.
y. = day numbers
x. = optional:
0 - result in form <yyyy mm dd> (default)
1 - result in form <yyyymmdd>
example:
todate 72460
1998 5 23
todate 0 1 2 3 + todayno 1992 2 27
1992 2 27
1992 2 28
1992 2 29
1992 3 1
todayno............. (v) converts dates to day numbers
converts dates to day numbers, converse <todate>
y. = dates
x. = optional:
0 - dates in form <yyyy mm dd> (default)
1 - dates in form <yyyymmdd>
0 = todayno 1800 1 1, or earlier
example:
todayno 1998 5 23
72460
tsdiff.............. (v) differences between pairs of dates.
form: end tsdiff begin
end, begin are vectors or matrices in form YYYY MM DD
end dates should be later than begin dates
method is to subtract dates on a calendar basis to determine
integral number of months plus the exact number of days remaining.
This is converted to payment periods, where # days remaining are
calculated as: (# days)%365
example:
1994 10 1 tsdiff 1986 5 23
8.35799
tsrep............... (v) timestamp representation as a single number
form: [opt] timerep times
opt=0 convert timestamps to numbers (default)
1 convert numbers to timestamps
timestamps are in 6!:0 format, or matrix of same.
examples:
tsrep 1800 1 1 0 0 0
0
":!.13 tsrep 1995 5 23 10 24 57.24
6165887097240
tstamp.............. (v) format time stamp as: 23 May 1998 16:06:39
y. is time stamp, if empty default to current time
valdate............. (v) validate dates
form: valdate dates
dates is 3-element vector
or 3-column matrix
in form YYYY MM DD
returns 1 if valid
weekday............. (v) returns weekday from date, 0=Sunday ... 6=Saturday
arguments as for <todayno>, e.g.
5 = weekday 1997 5 23 = 1 weekday 19970523