Vector

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

DenseVector, SparseVector
```
public interface Vector
extends scala.Serializable
```
Represents a numeric vector, whose index type is Int and value type is Double.
Note: Users should not implement this interface.

Method Summary

Methods
Modifier and Type	Method and Description
`double`	`apply(int i)` Gets the value of the ith element.
`int`	`argmax()` Find the index of a maximal element.
`Vector`	`compressed()` Returns a vector in either dense or sparse format, whichever uses less storage.
`Vector`	`copy()` Makes a deep copy of this vector.
`boolean`	`equals(java.lang.Object other)`
`void`	`foreachActive(scala.Function2<java.lang.Object,java.lang.Object,scala.runtime.BoxedUnit> f)` Applies a function `f` to all the active elements of dense and sparse vector.
`int`	`hashCode()` Returns a hash code value for the vector.
`int`	`numActives()` Number of active entries.
`int`	`numNonzeros()` Number of nonzero elements.
`int`	`size()` Size of the vector.
`double[]`	`toArray()` Converts the instance to a double array.
`breeze.linalg.Vector<java.lang.Object>`	`toBreeze()` Converts the instance to a breeze vector.
`DenseVector`	`toDense()` Converts this vector to a dense vector.
`SparseVector`	`toSparse()` Converts this vector to a sparse vector with all explicit zeros removed.

- Method Detail
  - size
```
int size()
```
    Size of the vector.
    
    Returns:
    (undocumented)
  - toArray
```
double[] toArray()
```
    Converts the instance to a double array.
    
    Returns:
    (undocumented)
  - equals
```
boolean equals(java.lang.Object other)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
int hashCode()
```
    Returns a hash code value for the vector. The hash code is based on its size and its nonzeros in the first 16 entries, using a hash algorithm similar to java.util.Arrays.hashCode.
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    (undocumented)
  - toBreeze
```
breeze.linalg.Vector<java.lang.Object> toBreeze()
```
    Converts the instance to a breeze vector.
    
    Returns:
    (undocumented)
  - apply
```
double apply(int i)
```
    Gets the value of the ith element.
    
    Parameters:
    i - index
    
    Returns:
    (undocumented)
  - copy
```
Vector copy()
```
    Makes a deep copy of this vector.
    
    Returns:
    (undocumented)
  - foreachActive
```
void foreachActive(scala.Function2<java.lang.Object,java.lang.Object,scala.runtime.BoxedUnit> f)
```
    Applies a function f to all the active elements of dense and sparse vector.
    
    Parameters:
    f - the function takes two parameters where the first parameter is the index of the vector with type Int, and the second parameter is the corresponding value with type Double.
  - numActives
```
int numActives()
```
    Number of active entries. An "active entry" is an element which is explicitly stored, regardless of its value. Note that inactive entries have value 0.
    
    Returns:
    (undocumented)
  - numNonzeros
```
int numNonzeros()
```
    Number of nonzero elements. This scans all active values and count nonzeros.
    
    Returns:
    (undocumented)
  - toSparse
```
SparseVector toSparse()
```
    Converts this vector to a sparse vector with all explicit zeros removed.
    
    Returns:
    (undocumented)
  - toDense
```
DenseVector toDense()
```
    Converts this vector to a dense vector.
    
    Returns:
    (undocumented)
  - compressed
```
Vector compressed()
```
    Returns a vector in either dense or sparse format, whichever uses less storage.
    
    Returns:
    (undocumented)
  - argmax
```
int argmax()
```
    Find the index of a maximal element. Returns the first maximal element in case of a tie. Returns -1 if vector has length 0.
    
    Returns:
    (undocumented)

Interface Vector

Method Summary

Method Detail

size

toArray

equals

hashCode

toBreeze

apply

copy

foreachActive

numActives

numNonzeros

toSparse

toDense

compressed

argmax