Compute per-group arg-max
argmax_g(col, first_indices)
Arguments
| col |
vector to max |
| first_indices |
numeric index of first index in each group |
Value
per-group arg-max
Examples
v <- c(2, 3, 1, 7, 5)
fi <- c(1, 1, 3, 3, 3)
argmax_g(v, fi)
#> [1] 2 2 4 4 4