Latest diagonal of a triangle

The latest observed value of every (index, column, origin).

Usage

latest_diagonal(x)

Arguments

x

A triangle.

Value

A 3-D array (index x column x origin) with dimnames, NA where an origin has no observation.

Examples

long <- data.frame(year = c(2020, 2020, 2021), age = c(12, 24, 12), paid = c(100, 150, 110))
latest_diagonal(triangle(long, "year", "age", "paid"))[1, "paid", ]
#> 2020 2021 
#>  150  110