Examples of cern.colt.matrix.DoubleMatrix2D

cern.colt.matrix.DoubleMatrix2D
Abstract base class for 2-d matrices holding double elements. First see the package summary and javadoc tree view to get the broad picture.
A matrix has a number of rows and columns, which are assigned upon instance construction - The matrix's size is then rows()*columns(). Elements are accessed via [row,column] coordinates. Legal coordinates range from [0,0] to [rows()-1,columns()-1]. Any attempt to access an element at a coordinate column<0 || column>=columns() || row<0 || row>=rows() will throw an IndexOutOfBoundsException.
Note that this implementation is not synchronized. @author wolfgang.hoschek@cern.ch @version 1.0, 09/24/99

}
/**
 */
public static void doubleTest21() {
System.out.println("\n\n");
DoubleMatrix2D A;
int k;
int uk;
int lk;


double[][] values1 =

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}
/**
 */
public static void doubleTest22() {
System.out.println("\n\n");
DoubleMatrix2D A;
int k;
int uk;
int lk;


double[][] values1 =

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/**
 */
public static void doubleTest23(int runs, int size, double nonZeroFraction, boolean dense) {
System.out.println("\n\n");
System.out.println("initializing...");
DoubleMatrix2D A, LU, I, Inv;
DoubleMatrix1D b, solved;


double mean = 5.0;
double stdDev = 3.0; 
cern.jet.random.Normal random = new cern.jet.random.Normal(mean, stdDev, new cern.jet.random.engine.MersenneTwister());


System.out.println("sampling...");
double value = 2;
if (dense) 
  A = Factory2D.dense.sample(size,size, value, nonZeroFraction);
else
  A = Factory2D.sparse.sample(size,size, value, nonZeroFraction);
b = A.like1D(size).assign(1);


//A.assign(random);
//A.assign(F.rint); // round
System.out.println("generating invertible matrix...");
Property.generateNonSingular(A);


//I = Factory2D.identity(size);


LU = A.like();
solved = b.like();
//Inv = Factory2D.make(size,size);


LUDecompositionQuick lu = new LUDecompositionQuick();

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/**
 */
public static void doubleTest24(int runs, int size, boolean dense) {
System.out.println("\n\n");
System.out.println("initializing...");
DoubleMatrix2D A;
DoubleFactory2D factory;
if (dense) 
  factory = Factory2D.dense;
else 
  factory = Factory2D.sparse;
  
double value = 2;
double omega = 1.25;
final double alpha = omega * 0.25;
final double beta = 1-omega;
A = factory.make(size,size,value);


cern.colt.function.Double9Function function = new cern.colt.function.Double9Function() {
  public final double apply(double a00, double a01, double a02, double a10, double a11, double a12, double a20, double a21, double a22) {
    return alpha*a11 + beta*(a01+a10+a12+a21);
  }
};
cern.colt.Timer timer = new cern.colt.Timer().start();


System.out.println("benchmarking stencil...");
for (int i=0; i<runs; i++) {
  A.zAssign8Neighbors(A,function);
}
//A.zSum4Neighbors(A,alpha,beta,runs);
timer.stop().display();
//System.out.println("A="+A);
A=null;

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System.out.println("\n\n");
System.out.println("initializing...");
boolean dense = true;
DoubleMatrix2D A;
DoubleFactory2D factory;
if (dense) 
  factory = Factory2D.dense;
else 
  factory = Factory2D.sparse;

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System.out.println("\n\n");
System.out.println("initializing...");
boolean dense = true;
DoubleMatrix2D A;
DoubleFactory2D factory;
if (dense) 
  factory = Factory2D.dense;
else 
  factory = Factory2D.sparse;

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for (int i=columns; --i >= 0; ) trainingSet[i][i]=2.0;


int patternIndex        = 0;
int unitIndex           = 0;


DoubleMatrix2D patternMatrix       = null;
DoubleMatrix2D transposeMatrix     = null;
DoubleMatrix2D QMatrix             = null;
DoubleMatrix2D inverseQMatrix      = null;
DoubleMatrix2D pseudoInverseMatrix = null;
DoubleMatrix2D weightMatrix        = null;


// form a matrix with the columns as training vectors
patternMatrix = DoubleFactory2D.dense.make (rows, columns);


// copy the patterns into the matrix

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    { 1, 2, 3, 4, 5, 6},
    { 2, 3, 4, 5, 6, 7}
  };
  DoubleFactory2D f = DoubleFactory2D.dense;
  DoubleMatrix1D vector = new DenseDoubleMatrix1D(data);
  DoubleMatrix2D matrix = f.make(arrMatrix);
  DoubleMatrix1D res = vector.like(matrix.rows());
  
  matrix.zMult(vector,res);


  System.out.println(res);
}

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    { 1, 2, 3, 4, 5, 6},
    { 2, 3, 4, 5, 6, 7}
  };
  
  DoubleMatrix1D vector = new DenseDoubleMatrix1D(data);
  DoubleMatrix2D matrix = f.make(arrMatrix);
  DoubleMatrix1D res = vector.like(matrix.rows());
  
  matrix.zMult(vector,res);


  System.out.println(res);
}

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}
/**
 */
public static void doubleTest29(int size,DoubleFactory2D f) {
  
  DoubleMatrix2D x = new DenseDoubleMatrix2D(size,size).assign(0.5);
  DoubleMatrix2D matrix = f.sample(size,size,0.5,0.001);
  
  cern.colt.Timer timer = new cern.colt.Timer().start();
  DoubleMatrix2D res = matrix.zMult(x,null);
  timer.stop().display();
  
  //System.out.println(res);
}

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cern.colt.matrix.impl.Benchmark

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