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secondo/Algebras/DBScan/DBScan.examples
2026-01-23 17:03:45 +08:00

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Database: berlintest
Restore : NO
Operator : dbscanR
Number : 1
Signature: stream(Tuple) x Id x Id x real x int -> stream(Tuple)
Example : query Kneipen feed extend[B : bbox(.GeoData)] dbscanR [B, No, 500.0, 5] sortby[No] groupby[No ; C : group count] count
Result : 8
Operator : dbscanM
Number : 1
Signature: stream(Tuple) x Id x Id x real x int (x geoid) -> stream(Tuple)
Example : query Kneipen feed dbscanM [GeoData, No, 500.0, 5] sortby[No] groupby[No ; C : group count] count
Result : 8
Operator : dbscanF
Number : 1
Signature: stream(Tuple) x Id x Id x real x int x fun -> stream(Tuple)
Example : query Kneipen feed dbscanF[GeoData, No, 500.0, 5, distance(.,..)] sortby[No] groupby[No ; C : group count] count
Result : 8
Operator : dbscanTF
Number : 1
Signature: stream(Tuple) x Id x real x int x fun -> stream(Tuple)
Example : query Kneipen feed dbscanTF[No, 500.0, 5, distance(.GeoData, ..GeoData) ] sortby[No] groupby[No ; C : group count] count
Result : 8