rowAt

rowAt(X, Y)

Please see rowFunctions for the parameters and calculation rules.

X is a matrix.

Y can be a vector of integers.

Retrieve the element in each row of X based on the index specified by the corresponding element of Y. Return a vector with the same length as the number of input rows.

m = matrix(3.1 4.5 2.2, 4.2 4.3 5.1, 6.2 7.1 2.2, 1.8 6.1 5.3, 7.1 8.4 3.5)
index = 4 0 2
rowAt(m, index)
// output
[7.1,4.5,2.2]

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), rowImin(vol1, vol2, vol3, vol4, vol5)) as price1, rowAt(matrix(p1, p2, p3, p4, p5), rowImax(vol1, vol2, vol3, vol4, vol5)) as price2 from trades

Related functions: at