Question

Dicing involves selecting a subset of cells by specifying a range of attribute values.

Answer 1

Dicing involves selecting a subset of cells byspecifying a range of attribute values.–This is equivalent to defining a subarray from thecomplete array.In practice, both operations can also beaccompanied by aggregation over somedimensions.© Tan,Steinbach, Kumar Introduction to Data Mining 8/05/2005 40OLAP Operations: Roll-up and Drill-downAttribute values often have a hierarchicalstructure.–Each date is associated with a year, month, and week.–A location is associated with a continent, country, state(province, etc.), and city.–Products can be divided into various categories, suchas clothing, electronics, and furniture.Note that these categories often nest and form atree or lattice–A year contains months which contains day–A country contains a state which contains a city



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