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DataStreamingAlgorithms

BarnaSaha

DevelopingStreamingAlgorithms• Themainhurdleisthespace.

• Oftenitismuchmoreefficienttogetanapproximateanswerthananexactanswer.

• Oftenthealgorithmusesrandomizationlikehashingandsampling.

MiniExercise[DueOct31st]

• ImplementCountMinSketchandplotthefrequencyofallelementsasreportedbytheCountMinsketchdatastructureaswellastheirtruefrequenciesusingε=0.01andnumberofhashfunctions=25.– Data:considerastreamofsize1000000whereeachelementinthestreamarrivesfrom[1,1000]chosenuniformlyatrandom.

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