rowImax

rowImax(args...)

Please see rowFunctions for the parameters and calculation rules.

Return the index of the maximum in each row. If there are multiple maxima, return the index of the first maximum from the left. The result is a vector with the same length as the number of input rows.

m=matrix([4.5 2.6 1.5 3.2, 1.5 4.8 5.9 1.7, 4.9 2.0 NULL 5.5])
print rowImax(m)
// output
[2,1,1,2]

trades = table(10:0,`time`sym`p1`p2`p3`p4`p5`vol1`vol2`vol3`vol4`vol5,[TIMESTAMP,SYMBOL,DOUBLE,DOUBLE,DOUBLE,DOUBLE,DOUBLE,INT,INT,INT,INT,INT])
insert into trades values(2022.01.01T09:00:00, `A, 33.2, 33.8, 33.6, 33.3, 33.1, 200, 180, 180, 220, 200)
insert into trades values(2022.01.01T09:00:00, `A, 33.1, 32.8, 33.2, 34.3, 32.3, 150, 280, 190, 100, 220)
insert into trades values(2022.01.01T09:00:00, `A, 31.2, 32.6, 33.6, 35.3, 34.5, 220, 160, 130, 100, 110)
insert into trades values(2022.01.01T09:00:00, `A, 30.2, 32.5, 33.6, 35.3, 34.1, 200, 180, 150, 140, 120)
insert into trades values(2022.01.01T09:00:00, `A, 33.2, 33.8, 33.6, 33.3, 33.1, 180, 160, 160, 180, 200)
select rowAt(matrix(p1, p2, p3, p4, p5), rowImax(vol1, vol2, vol3, vol4, vol5)) as price from trades

a = 1 8 3 8 1
b = 5 8 1 3 6
c =  9 5 4 7 6
x = fixedLengthArrayVector(a, b, c)
rowImax(x)
// output
[2,0,2,0,1]

Related functions: imax