Compute sum of values binned by a second variable

Compute sum of values binned by a second variable

bySumFf(values, bins)

Arguments

values	An ff object containing the numeric values to take the sum of.
bins	An ff object containing the numeric values to bin by.

Examples

values <- ff::as.ff(c(1, 1, 2, 2, 1))
bins <- ff::as.ff(c(1, 1, 1, 2, 2))
bySumFf(values, bins)
#>   bins sums
#> 1    1    4
#> 2    2    3