From the raw data file spinrates.csv the comma delimited data
was converted to a data frame using data.table::fread().
The data are baseball percent "swing and miss" with their respective average
ball velocity and levels of spinrate.
| id | character giving the observation id |
| velocity | numeric average velocity of the ball |
| spinrate | character factor with 12 levels |
| swing_miss | numeric rate of swing and miss |
spinratesAn object of class data.table (inherits from data.frame) with 168 rows and 4 columns.