java.lang.Object
- org.apache.sysds.runtime.compress.estim.CompressedSizeInfoColGroup

```
public class CompressedSizeInfoColGroup
extends Object
```
Information collected about a specific ColGroup's compression size.

Constructor Summary

Constructors
Constructor Description

CompressedSizeInfoColGroup(int[] columns, int nRows)
Create empty.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clearMap()`
`boolean`	`containsZeros()`
`Map<AColGroup.CompressionType,Long>`	`getAllCompressionSizes()`
`AColGroup.CompressionType`	`getBestCompressionType()`
`AColGroup.CompressionType`	`getBestCompressionType(CompressionSettings cs)`
`double`	`getCardinalityRatio()`
`int[]`	`getColumns()`
`long`	`getCompressionSize(AColGroup.CompressionType ct)`
`int`	`getLargestOffInstances()`
`IEncode`	`getMap()`
`long`	`getMinSize()`
`double`	`getMostCommonFraction()`
`int`	`getNumOffs()`	Number of offsets, or number of non zero values.
`int`	`getNumRows()`
`int`	`getNumVals()`	Note cardinality is the same as number of distinct values.
`double`	`getTupleSparsity()`
`boolean`	`isConst()`
`boolean`	`isEmpty()`
`String`	`toString()`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail
- CompressedSizeInfoColGroup
```
public CompressedSizeInfoColGroup(int[] columns,
                                  int nRows)
```
  Create empty.
  
  Parameters:
  
  columns - columns
  
  nRows - number of rows

Method Detail

getCompressionSize

public long getCompressionSize(AColGroup.CompressionType ct)

getBestCompressionType

public AColGroup.CompressionType getBestCompressionType(CompressionSettings cs)

getBestCompressionType

public AColGroup.CompressionType getBestCompressionType()

getAllCompressionSizes

public Map<AColGroup.CompressionType,Long> getAllCompressionSizes()

getMinSize
```
public long getMinSize()
```

getNumVals
```
public int getNumVals()
```
Note cardinality is the same as number of distinct values.

Returns:

cardinality or number of distinct values.

getNumOffs
```
public int getNumOffs()
```
Number of offsets, or number of non zero values.

Returns:

Number of non zeros or number of values.

getColumns
```
public int[] getColumns()
```

getNumRows
```
public int getNumRows()
```

getCardinalityRatio
```
public double getCardinalityRatio()
```

getMostCommonFraction
```
public double getMostCommonFraction()
```

getLargestOffInstances
```
public int getLargestOffInstances()
```

getTupleSparsity
```
public double getTupleSparsity()
```

getMap
```
public IEncode getMap()
```

containsZeros
```
public boolean containsZeros()
```

isEmpty
```
public boolean isEmpty()
```

isConst
```
public boolean isConst()
```

clearMap
```
public void clearMap()
```

toString
```
public String toString()
```
Overrides:

toString in class Object

Class CompressedSizeInfoColGroup

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

CompressedSizeInfoColGroup

Method Detail

getCompressionSize

getBestCompressionType

getBestCompressionType

getAllCompressionSizes

getMinSize

getNumVals

getNumOffs

getColumns

getNumRows

getCardinalityRatio

getMostCommonFraction

getLargestOffInstances

getTupleSparsity

getMap

containsZeros

isEmpty

isConst

clearMap

toString