Extraction Transformation Language (ETL)

Now, CSV data are simply lists of lists and all the elements presented in the course can be apply: selection with filter, transformation with map, computation with reduce.

As an exercise, how to get the means for the following marks using an ETL model ?

name | mark
-----------
bill | 14
kate | 18
mark | 12

You can train yourself by finding all available statistical functions (eg. min, distribution, etc.).