Examples of MatrixBuilder

com.mockturtlesolutions.snifflib.util.MatrixBuilder
edu.ucla.sspace.matrix.MatrixBuilder
An interface for utilities that support incrementally building matrices on disk, one column at a time. Instances of these class are designed to abstract away the format-specific details of writing the matrix to disk.
Columns may be added via the {@code addColumn} method until the matrix has the desired data. The underlyingmatrix structure will expand to match the dimensions of the input data. Great care should be taken when using {@link SparseArray} and {@link DoubleVector} instances to ensure that the values returned by theirrespective {@code length} methods are fixed to the actual data structuresize, rather than the a possible maximum size of the struture. This is necessary to determine this matrix's dimension; passing in an array or vector with a maximum size bound will greatly distort the matrix's size.
After all the data has been added, the {@code finish} method should beinvoked. Instances should use this as a signal to finish any last remaining writes or perform any necessary post processing for the matrix. Once this method returns the {@code getMatrixFile} method will allow access to thefinished data in its correct format.
Implementations may cache all, part, or none of the data prior to finishing the matrix data. However, all implementations are expected to be have a low memory overhead, especially when building large matrices.
All implementations are expected to be thread-safe. @author David Jurgens
org.renjin.primitives.matrix.MatrixBuilder

Examples of com.mockturtlesolutions.snifflib.util.MatrixBuilder

    this.contentPane = this.getContentPane();
    
    this.contentPane.setLayout(new BoxLayout(this.contentPane,BoxLayout.Y_AXIS));
    this.pH = new DblMatrix(new Double(7.0));
    
    this.matrixBuilder = new MatrixBuilder();
    this.matrixBuilder.setMinVal(new DblMatrix(2.0));
    this.matrixBuilder.setMaxVal(new DblMatrix(12.0));
    this.matrixBuilder.setStepVal(new DblMatrix(25.0));
    
    this.okButton = new JButton("Ok");

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Examples of edu.ucla.sspace.matrix.MatrixBuilder

            verbose("Generating a new reference set");


            List<SparseDoubleVector> vectors =
                new ArrayList<SparseDoubleVector>();
            // Assume that data is sparse.
            MatrixBuilder builder = new ClutoSparseMatrixBuilder();
            for (int i = 0; i < rows; ++i) {
                int cols = minValues.length;


                // If the average number of values per row is significantly
                // smaller than the total number of columns then select a subset

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Examples of org.renjin.primitives.matrix.MatrixBuilder

  public static Vector Rrowsum_matrix(Vector x, int ncol, AtomicVector groups, AtomicVector ugroup, boolean naRm) {
    
    int numGroups = ugroup.length();
    
    Matrix source = new Matrix(x, ncol);
    MatrixBuilder result = source.newBuilder(numGroups, ncol);
    
    for(int col=0;col!=ncol;++col) {
      
      // sum the rows in this column by group
      
      double groupSums[] = new double[numGroups];
      for(int row=0;row!=source.getNumRows();++row) {
        int group = ugroup.indexOf(groups, row, 0);
        groupSums[group] += source.getElementAsDouble(row, col);
      }
      
      // copy sums to matrix
      for(int group=0;group!=ugroup.length();++group) {
        result.setValue(group, col, groupSums[group]);
      }
      
    }
    return result.build();
  }

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