mean method
- bool treatNullsAsZeros = true,
Returns the column's mean. Set treatNullsAsZeros for the method
to not account for null records.
Note: requires column records type to be a subtype of <num?>
Implementation
double mean({bool treatNullsAsZeros = true}) =>
_nullFreedNums(treatNullsAsZeros: treatNullsAsZeros).average;