ucar.ma2
Class MAVector

java.lang.Object
  extended by ucar.ma2.MAVector

public class MAVector
extends Object

Abstraction for vector operations. A vector is a rank-1 Array. All operations done in double precision (??)

Author:
@caron

Constructor Summary
MAVector(Array a)
          Create an MAVector using the given rank-1 array.
MAVector(double[] values)
          Create an MAVector out of a double array
MAVector(int nelems)
          Create an MAVector of the given length.
 
Method Summary
 MAVector copy()
          Create a new MAVector that is the same as this one, with a copy of the backing store.
 double cos(MAVector v)
          Cos between two vectors = dot(v) / norm() * norm(v)
 double dot(MAVector v)
          Dot product of 2 vectors
 double getDouble(int i)
           
 int getNelems()
           
 double norm()
          Get the L2 norm of this vector.
 void normalize()
          Normalize this vector, so it has norm = 1.0.
 void setDouble(int i, double val)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MAVector

public MAVector(double[] values)
Create an MAVector out of a double array


MAVector

public MAVector(int nelems)
Create an MAVector of the given length.


MAVector

public MAVector(Array a)
Create an MAVector using the given rank-1 array.

Parameters:
a - rank-1 array
Throws:
IllegalArgumentException - is a is not rank 1
Method Detail

getNelems

public int getNelems()

getDouble

public double getDouble(int i)

setDouble

public void setDouble(int i,
                      double val)

copy

public MAVector copy()
Create a new MAVector that is the same as this one, with a copy of the backing store.


cos

public double cos(MAVector v)
Cos between two vectors = dot(v) / norm() * norm(v)

Parameters:
v - cosine with this vector
Returns:
double result: cos between this and v
Throws:
IllegalArgumentException - if nelems != v.getNelems().

dot

public double dot(MAVector v)
Dot product of 2 vectors

Parameters:
v - dot product with this vector
Returns:
double result: dot product
Throws:
IllegalArgumentException - if nelems != v.getNelems().

norm

public double norm()
Get the L2 norm of this vector.

Returns:
double norm

normalize

public void normalize()
Normalize this vector, so it has norm = 1.0.



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