Hi Sean,
If you want "replace data" with new rows of data, or change existing
rows of data, all the charts in Swivel would get updated as well.
However, Swivel will only allow you to replace data if the new data
set has the same (number and names) of columns as the existing one.
So, in the case of creating a new column with the rankings of Olympic
athletes, you would need to create a new data set.
Hope this helps!
Best,
Natalie