{forcats}
lump all factor levels except the most frequent
{forcats}
lump factor levels that appear fewer than a certain number of times
{forcats}
reorder factor levels by sorting along another variable
{forcats}
reverse order of factor levels
{forcats}
lump factor levels that appear fewer than a certain proportion of times
{forcats}
collapse factors into manually defined groups
{forcats}
reorder factor levels in the order that they first appear
{base}
view and change factor levels
{forcats}
change factor levels by hand
{forcats}
reorder factor levels by hand
The end!