Error using volume field as grouping field

[dkyleward]

Initially, I tried to call link_stats_table as shown below. I used ToTDlyVol for both the volume and group_field variable.

link_stats <- link_stats_table(
  tbl, volume = "ToTDlyVol", count = "Daily.Counts", group_field = "ToTDlyVol",
  type = "flow"
  )

This led to the following error message:

Error in summarise_impl(.data, dots) : ‘sum’ not meaningful for factors

To correct this, I made a copy of the ToTDlyVol field to use as the grouping variable.

link_stats <- link_stats_table(
  tbl, volume = "ToTDlyVol", count = "Daily.Counts", group_field = "vol_group",
  type = "flow"
  )

It would be nice to improve the function to be able to use the same field for both variables.