| Package | Description | 
|---|---|
| org.apache.sysds.runtime.compress | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ReaderColumnSelectionDense | 
| class  | ReaderColumnSelectionDenseSampleconsiders only a subset of row indexes | 
| class  | ReaderColumnSelectionSparseUsed to extract the values at certain indexes from each row in a sparse matrix
 
 Keeps returning all-zeros arrays until reaching the last possible index. | 
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