공부/통계·ML

Data granularity와 Aggregation

jiyoonmik 2022. 8. 10. 01:13

granularity: 데이터가 세분화 된 정도! 결합된 정도! 얼마나 자세히 분할되어있는지. 곡물 grain의 입자도가 어원인 듯하다.

Fine-grained system = high granularity = broken down into larger number of smaller parts.
Coarse-grained system = low granularity = smaller number of larger parts.

Aggregation and granularity are complementary concepts. Aggregation is a mathematical operation that takes multiple values and returns a single value: operations like sum, average, count, or minimum. This changes the data to a lower granularity (aka a higher level of detail).