Sparse ARFF Files

• Similar to AARF files except that data value 0 are not represented

• Non-zero attributes are specified by attribute number and value

• For examples of ARFF files see $WEKAHOME/data

@data

0, X, 0, Y, “class A”

0, 0, W, 0, "class B"

@data

{1 X, 3 Y, 4 "class A"}

{2 W, 4 "class B"}

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