Examples of cern.colt.matrix.DoubleMatrix1D.aggregate()

cern.colt.matrix.DoubleMatrix1D.aggregate()
x[i]*x[i] ) matrix.aggregate(F.plus,F.square); --> 14 For further examples, see the package doc. @param aggr an aggregation function taking as first argument the current aggregation and as second argument the transformed current cell value. @param f a function transforming the current cell value. @return the aggregated measure. @see cern.jet.math.Functions

  }
));
//--> 14


// Sum( x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.square));
//--> 14


// Sum( x[i]*x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.pow(3)));
//--> 36

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// Sum( x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.square));
//--> 14


// Sum( x[i]*x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.pow(3)));
//--> 36


// Sum( x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.identity));
//--> 6

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// Sum( x[i]*x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.pow(3)));
//--> 36


// Sum( x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.identity));
//--> 6


// Min( x[i] ) 
System.out.println(matrix.aggregate(F.min,F.identity));
//--> 0

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// Sum( x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.identity));
//--> 6


// Min( x[i] ) 
System.out.println(matrix.aggregate(F.min,F.identity));
//--> 0


// Max( Sqrt(x[i]) / 2 ) 
System.out.println(matrix.aggregate(F.max,F.chain(F.div(2),F.sqrt)));
//--> 0.8660254037844386

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// Min( x[i] ) 
System.out.println(matrix.aggregate(F.min,F.identity));
//--> 0


// Max( Sqrt(x[i]) / 2 ) 
System.out.println(matrix.aggregate(F.max,F.chain(F.div(2),F.sqrt)));
//--> 0.8660254037844386


// Number of all cells with 0 <= value <= 2
System.out.println(matrix.aggregate(F.plus,F.between(0,2)));
//--> 3

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// Max( Sqrt(x[i]) / 2 ) 
System.out.println(matrix.aggregate(F.max,F.chain(F.div(2),F.sqrt)));
//--> 0.8660254037844386


// Number of all cells with 0 <= value <= 2
System.out.println(matrix.aggregate(F.plus,F.between(0,2)));
//--> 3


// Number of all cells with 0.8 <= Log2(value) <= 1.2
System.out.println(matrix.aggregate(F.plus,F.chain(F.between(0.8,1.2),F.log2)));
//--> 1

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// Number of all cells with 0 <= value <= 2
System.out.println(matrix.aggregate(F.plus,F.between(0,2)));
//--> 3


// Number of all cells with 0.8 <= Log2(value) <= 1.2
System.out.println(matrix.aggregate(F.plus,F.chain(F.between(0.8,1.2),F.log2)));
//--> 1


// Product( x[i] )
System.out.println(matrix.aggregate(F.mult,F.identity));
//--> 0

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// Number of all cells with 0.8 <= Log2(value) <= 1.2
System.out.println(matrix.aggregate(F.plus,F.chain(F.between(0.8,1.2),F.log2)));
//--> 1


// Product( x[i] )
System.out.println(matrix.aggregate(F.mult,F.identity));
//--> 0


// Product( x[i] ) of all x[i] > limit
final double limit = 1;
DoubleFunction f = new DoubleFunction() {

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// Product( x[i] ) of all x[i] > limit
final double limit = 1;
DoubleFunction f = new DoubleFunction() {
  public final double apply(double a) { return a>limit ? a : 1; }
};
System.out.println(matrix.aggregate(F.mult,f));
//--> 6


// Sum( (x[i]+y[i])^2 )
DoubleMatrix1D otherMatrix1D = matrix.copy();
System.out.println(matrix.aggregate(otherMatrix1D, F.plus, F.chain(F.square,F.plus)));

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  }
));
//--> 14


// Sum( x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.square));
//--> 14


// Sum( x[i]*x[i]*x[i] ) 
System.out.println(matrix.aggregate(F.plus,F.pow(3)));
//--> 36

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