| Package | Description | 
|---|---|
| org.apache.sysds.runtime.compress | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
ReaderColumnSelectionDense  | 
class  | 
ReaderColumnSelectionDenseSample
considers only a subset of row indexes 
 | 
class  | 
ReaderColumnSelectionSparse
Used 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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