tmove

Syntax

tmove(T, X, window)

Arguments

T is a non-strictly increasing vector of temporal or integral type. It cannot contain NULL values.

X is a vector with the same length as T.

window is a positive integer or DURATION type.

Details

For each element T i in T, return the element in X which is at the same position as (T i-window) in T. If there is no match of (T i - window) in T, return the corresponding element in X at the previous adjacent time of (Ti - window).

Examples

T = 1 1 1 2 5 6
X = 1 4 NULL -1 NULL 4
m = table(T as t,X as x)
select *, tmove(t, x, 3) from m
t x tmove_t
1 1
1 4
1
2 -1
5 -1
6 4 -1
T = 2021.01.02 2021.01.02  2021.01.04  2021.01.05 2021.01.07 2021.01.09
X = 5 4 NULL -1 2 4
m = table(T as t,X as x)
select *, tmove(t, x, 3d) from m
t x tmove_t
2021.01.02 5
2021.01.02 4
2021.01.04
2021.01.05 -1 4
2021.01.07 2
2021.01.09 4 -1
select *, tmove(t, x, 1w) from m
t x tmove_t
2021.01.02 5
2021.01.02 4
2021.01.04
2021.01.05 -1
2021.01.07 2
2021.01.09 4 4

Related function: move