Describe outputs various statistical information a Series or Dataframe.

DropNil drops all rows that contain nil values.

FillNil replaces all nil values with replaceVal.

Mean will fill Nil values with the mean.

Sum will fill Nil values with the sum.

DescribeOptions configures what Describe should return or display.

DescribeOutput contains statistical data for a DataFrame or Series.

SpecialFillNilValue is a special value type for the FillNil function.