public class Vector extends Object implements NumberVector<Vector,Double>
Modifier and Type | Field and Description |
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protected double[] |
elements
Array for internal storage of elements.
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Constructor and Description |
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Vector(double... values)
Construct a vector from a given array.
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Vector(int m)
Provides an m x 1 vector.
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Modifier and Type | Method and Description |
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byte |
byteValue(int dimension)
Returns the value in the specified dimension as byte.
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Vector |
clone()
Clone the Vector object.
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Vector |
copy()
Returns a copy of this vector.
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double |
doubleValue(int dimension)
Returns the value in the specified dimension as double.
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boolean |
equals(Object obj) |
double |
euclideanLength()
Returns the length of this vector.
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float |
floatValue(int dimension)
Returns the value in the specified dimension as float.
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double |
get(int i)
Returns the value at the specified row.
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double[] |
getArrayCopy()
Copy the internal two-dimensional array.
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double[] |
getArrayRef()
Access the internal two-dimensional array.
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Vector |
getColumnVector()
Returns a Vector representing in one column and
getDimensionality() rows the values of this NumberVector of V. |
int |
getDimensionality()
Returns the dimensionality of this vector.
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double |
getMax(int dimension)
Returns the maximum coordinate at the specified dimension.
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double |
getMin(int dimension)
Returns the minimum coordinate at the specified dimension.
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Double |
getValue(int dimension)
Returns the value in the specified dimension.
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int |
hashCode() |
int |
intValue(int dimension)
Returns the value in the specified dimension as int.
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long |
longValue(int dimension)
Returns the value in the specified dimension as long.
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Vector |
minus(Vector v)
Returns this vector minus the specified vector v.
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Vector |
minusEquals(double d)
Subtract a constant value from all dimensions.
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Vector |
minusEquals(Vector B)
A = A - B
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Vector |
minusTimes(Vector v,
double s)
Returns this vector minus the specified vector v times s.
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Vector |
minusTimesEquals(Vector B,
double s)
A = A - s * B
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<A> Vector |
newFeatureVector(A array,
ArrayAdapter<Double,A> adapter)
Returns a new FeatureVector of V for the given values.
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<A> Vector |
newNumberVector(A array,
NumberArrayAdapter<?,A> adapter)
Instantiate from any number-array like object.
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Vector |
newNumberVector(double[] values)
Returns a new NumberVector of N for the given values.
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Vector |
normalize()
Normalizes this vector to the length of 1.0.
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Vector |
plus(Vector v)
Returns a new vector which is the result of this vector plus the specified
vector.
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Vector |
plusEquals(double d)
Add a constant value to all dimensions.
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Vector |
plusEquals(Vector B)
A = A + B
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Vector |
plusTimes(Vector v,
double s)
Returns a new vector which is the result of this vector plus the specified
vector times the given factor.
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Vector |
plusTimesEquals(Vector B,
double s)
A = A + s * B
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Vector |
projection(Matrix v)
Projects this row vector into the subspace formed by the specified matrix
v.
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static Vector |
randomNormalizedVector(int dimensionality)
Returns a randomly created vector of length 1.0
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Vector |
rotate90Equals()
Rotate vector by 90 degrees.
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Vector |
set(int i,
double value)
Sets the value at the specified row.
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void |
setZero()
Reset the Vector to 0.
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short |
shortValue(int dimension)
Returns the value in the specified dimension as short.
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Vector |
times(double s)
Returns a new vector which is the result of this vector multiplied by the
specified scalar.
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Matrix |
times(Matrix B)
Linear algebraic matrix multiplication, A * B
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Vector |
timesEquals(double s)
Multiply a matrix by a scalar in place, A = s*A
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Matrix |
timesTranspose(Matrix B)
Linear algebraic matrix multiplication, A * B^T
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Matrix |
timesTranspose(Vector B)
Linear algebraic matrix multiplication, A * B^T
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String |
toString()
Returns a string representation of this vector.
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String |
toStringNoWhitespace()
Returns a string representation of this vector without adding extra
whitespace
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Matrix |
transposeTimes(Matrix B)
Linear algebraic matrix multiplication, AT * B
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double |
transposeTimes(Vector B)
Linear algebraic matrix multiplication, AT * B
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double |
transposeTimesTimes(Matrix B,
Vector c)
Linear algebraic matrix multiplication, aT * B * c
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static Vector |
unitVector(int dimensionality,
int i)
Returns the ith unit vector of the specified dimensionality.
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public Vector(double... values)
values
- array of doublespublic Vector(int m)
m
- the number of rowspublic static final Vector randomNormalizedVector(int dimensionality)
dimensionality
- dimensionalitypublic static final Vector unitVector(int dimensionality, int i)
dimensionality
- the dimensionality of the vectori
- the indexpublic final Vector copy()
public final double[] getArrayRef()
public final double[] getArrayCopy()
public final int getDimensionality()
getDimensionality
in interface FeatureVector<Vector,Double>
getDimensionality
in interface SpatialComparable
public final double get(int i)
i
- the row indexpublic final Vector set(int i, double value)
i
- the row indexvalue
- the value to be setpublic final Vector plus(Vector v)
v
- the vector to be addedpublic final Vector plusTimes(Vector v, double s)
v
- the vector to be addeds
- the scalarpublic final Vector plusEquals(Vector B)
B
- another matrixpublic final Vector plusTimesEquals(Vector B, double s)
B
- another matrixs
- Scalarpublic final Vector plusEquals(double d)
d
- Value to addpublic final Vector minus(Vector v)
v
- the vector to be subtracted from this vectorpublic final Vector minusTimes(Vector v, double s)
v
- the vector to be subtracted from this vectors
- the scaling factorpublic final Vector minusEquals(Vector B)
B
- another matrixpublic final Vector minusTimesEquals(Vector B, double s)
B
- another matrixs
- Scalarpublic final Vector minusEquals(double d)
d
- Value to subtractpublic final Vector times(double s)
s
- the scalar to be multipliedpublic final Vector timesEquals(double s)
s
- scalarpublic final Matrix times(Matrix B)
B
- another matrixpublic final Matrix transposeTimes(Matrix B)
B
- another matrixpublic final double transposeTimesTimes(Matrix B, Vector c)
B
- matrixc
- vector on the rightpublic final double transposeTimes(Vector B)
B
- another vectorpublic final Matrix timesTranspose(Matrix B)
B
- another matrixpublic final Matrix timesTranspose(Vector B)
B
- another matrixpublic final double euclideanLength()
public final Vector normalize()
public final Vector projection(Matrix v)
v
- the subspace matrixpublic final String toString()
public final String toStringNoWhitespace()
public void setZero()
public Vector rotate90Equals()
public double getMin(int dimension)
SpatialComparable
getMin
in interface SpatialComparable
dimension
- the dimension for which the coordinate should be returned,
where 1 ≤ dimension ≤ getDimensionality()
public double getMax(int dimension)
SpatialComparable
getMax
in interface SpatialComparable
dimension
- the dimension for which the coordinate should be returned,
where 1 ≤ dimension ≤ getDimensionality()
public Double getValue(int dimension)
FeatureVector
getValue
in interface FeatureVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public double doubleValue(int dimension)
NumberVector
getValue(dim).doubleValue()
, but usually this is much more
efficient due to boxing/unboxing cost.doubleValue
in interface NumberVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public float floatValue(int dimension)
NumberVector
getValue(dim).floatValue()
, but usually this is much more efficient
due to boxing/unboxing cost.floatValue
in interface NumberVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public int intValue(int dimension)
NumberVector
getValue(dim).intValue()
, but usually this is much more efficient
due to boxing/unboxing cost.intValue
in interface NumberVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public long longValue(int dimension)
NumberVector
getValue(dim).longValue()
, but usually this is much more efficient
due to boxing/unboxing cost.longValue
in interface NumberVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public short shortValue(int dimension)
NumberVector
getValue(dim).shortValue()
, but usually this is much more efficient
due to boxing/unboxing cost.shortValue
in interface NumberVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public byte byteValue(int dimension)
NumberVector
getValue(dim).byteValue()
, but usually this is much more efficient
due to boxing/unboxing cost.byteValue
in interface NumberVector<Vector,Double>
dimension
- the desired dimension, where 1 ≤ dimension ≤
this.getDimensionality()
public Vector getColumnVector()
NumberVector
getDimensionality()
rows the values of this NumberVector of V.getColumnVector
in interface NumberVector<Vector,Double>
getDimensionality()
rows the values of this
NumberVector of Vpublic Vector newNumberVector(double[] values)
NumberVector
newNumberVector
in interface NumberVector<Vector,Double>
values
- the values of the NumberVectorpublic <A> Vector newNumberVector(A array, NumberArrayAdapter<?,A> adapter)
NumberVector
newNumberVector
in interface NumberVector<Vector,Double>
A
- Array typearray
- Arrayadapter
- Adapterpublic <A> Vector newFeatureVector(A array, ArrayAdapter<Double,A> adapter)
FeatureVector
newFeatureVector
in interface FeatureVector<Vector,Double>
A
- Array typearray
- the values of the featureVectoradapter
- adapter class