businessMonthBegin

Syntax

businessMonthBegin(X, [offset], [n=1])

Arguments

X is a scalar/vector of data type DATE, DATEHOUR, DATETIME, TIMESTAMP or NANOTIMESTAMP.

offset (optional) 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 (optional) is a positive integer. The default value is 1.

Details

Return the first business day (Monday to Friday) of the month that X belongs to.

If parameter offset is specified, the result is updated every n months. Parameter offset works only if parameter n>1.

Examples

businessMonthBegin(2018.09.12);
// output
2018.09.03

businessMonthBegin(2018.09.12, 2018.07.12, 3);
// output
2018.07.02

date=2016.04.12+(1..10)*30
time = take(09:30:00, 10)
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);
t1;
date time sym qty price
2016.05.12 09:30:00 MSFT 2200 49.6
2016.06.11 09:30:00 MSFT 1900 29.46
2016.07.11 09:30:00 MSFT 2100 29.52
2016.08.10 09:30:00 MSFT 3200 30.02
2016.09.09 09:30:00 MSFT 6800 174.97
2016.10.09 09:30:00 MSFT 5400 175.23
2016.11.08 09:30:00 MSFT 1300 50.76
2016.12.08 09:30:00 MSFT 2500 50.32
2017.01.07 09:30:00 MSFT 8800 51.29
2017.02.06 09:30:00 MSFT 4500 52.38
select avg(price),sum(qty) from t1 group by businessMonthBegin(date,2016.01.01,2);
businessMonthBegin_date avg_price sum_qty
2016.05.02 39.53 4100
2016.07.01 29.77 5300
2016.09.01 175.1 12200
2016.11.01 50.54 3800
2017.01.02 51.835 13300

Related functions: businessMonthEnd, monthBegin, monthEnd, semiMonthBegin, semiMonthEnd