quarterBegin
Syntax
quarterBegin(X, [startingMonth=1], [offset], [n=1])
Arguments
X is a scalar/vector of data type DATE, DATEHOUR, DATETIME, TIMESTAMP or NANOTIMESTAMP.
startingMonth is an integer between 1 and 12 indicating a month. The default value is 1.
offset is a scalar of the same data type as X. It must be no greater than the minimum value of X. The default value is the minimum value of X.
n is a positive integer. The default value is 1.
Details
Return the first day of the quarter that X belongs to. The first months of the quarters are determined by startingMonth. Note that startingMonth=1 is equivalent to startingMonth=4, 7 or 10.
If parameter offset is specified, the result is updated every n quarters. Parameter offset works only if parameter n>1.
Examples
$ quarterBegin(2012.06.12);
2012.04.01
$ quarterBegin(2012.06.13 10:10:10.008,5);
2012.05.01
$ date=2016.01.12 2016.02.25 2016.05.12 2016.06.28 2016.07.10 2016.08.18 2016.09.02 2016.10.16 2016.11.26 2016.12.30
$ time = [09:34:07,09:36:42,09:36:51,09:36:59,09:32:47,09:35:26,09:34:16,09:34:26,09:38:12,09:38:13]
$ sym = take(`MSFT,10)
$ price= 49.6 29.46 29.52 30.02 174.97 175.23 50.76 50.32 51.29 52.38
$ qty = 2200 1900 2100 3200 6800 5400 1300 2500 8800 4500
$ t1 = table(date, time, sym, qty, price);
$ select avg(price),sum(qty) from t1 group by quarterBegin(date,1,2016.01.01,2)
quarterBegin_date |
avg_price |
sum_qty |
|---|---|---|
2016.01.01 |
34.65 |
9400 |
2016.07.01 |
92.491667 |
29300 |
Related functions: quarterEnd, businessQuarterBegin, businessQuarterEnd