This function will add the ADP data to the projections table from the projections_table function. It will add the average ADP from the sources specfied, and the difference between the overall rank and ADP

add_adp(projection_table, sources = c("RTS", "CBS", "ESPN", "Yahoo", "NFL",
"FFC"))

## Arguments

projection_table An output from the projections_table function Which ADP sources should be added. should be one or more of c("RTS", "CBS", "ESPN", "Yahoo", "NFL", "FFC")