List of viewColumn() Examples

Examples of viewColumn()

cern.colt.matrix.DoubleMatrix2D.viewColumn()
Constructs and returns a new slice view representing the rows of the given column. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa. To obtain a slice view on subranges, construct a sub-ranging view (viewPart(...)), then apply this method to the sub-range view.
Example:

2 x 3 matrix:
1, 2, 3
4, 5, 6 viewColumn(0) ==> Matrix1D of size 2:
1, 4

@param column the column to fix. @return a new slice view. @throws IndexOutOfBoundsException if column < 0 || column>= columns(). @see #viewRow(int)
cern.colt.matrix.impl.DenseDoubleMatrix2D.viewColumn()
org.apache.mahout.math.DenseMatrix.viewColumn()
org.apache.mahout.math.Matrix.viewColumn()
org.apache.mahout.math.matrix.DoubleMatrix2D.viewColumn()
Constructs and returns a new slice view representing the rows of the given column. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa. To obtain a slice view on subranges, construct a sub-ranging view (viewPart(...)), then apply this method to the sub-range view.
Example:

2 x 3 matrix:
1, 2, 3
4, 5, 6 viewColumn(0) ==> Matrix1D of size 2:
1, 4

@param column the column to fix. @return a new slice view. @throws IndexOutOfBoundsException if column < 0 || column>= columns(). @see #viewRow(int)

Examples of org.apache.mahout.math.Matrix.viewColumn()


    for (int m = low + 1; m <= high - 1; m++) {


      // Scale column.


      Vector hColumn = hessenBerg.viewColumn(m - 1).viewPart(m, high - m + 1);
      double scale = hColumn.norm(1);


      if (scale != 0.0) {
        // Compute Householder transformation.

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Examples of org.apache.mahout.math.Matrix.viewColumn()

        // Apply Householder similarity transformation
        // H = (I-u*u'/h)*H*(I-u*u')/h)


        Vector ortPiece = ort.viewPart(m, high - m + 1);
        for (int j = m; j < n; j++) {
          double f = ortPiece.dot(hessenBerg.viewColumn(j).viewPart(m, high - m + 1)) / h;
          hessenBerg.viewColumn(j).viewPart(m, high - m + 1).assign(ortPiece, Functions.plusMult(-f));
        }


        for (int i = 0; i <= high; i++) {
          double f = ortPiece.dot(hessenBerg.viewRow(i).viewPart(m, high - m + 1)) / h;

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Examples of org.apache.mahout.math.Matrix.viewColumn()

        // H = (I-u*u'/h)*H*(I-u*u')/h)


        Vector ortPiece = ort.viewPart(m, high - m + 1);
        for (int j = m; j < n; j++) {
          double f = ortPiece.dot(hessenBerg.viewColumn(j).viewPart(m, high - m + 1)) / h;
          hessenBerg.viewColumn(j).viewPart(m, high - m + 1).assign(ortPiece, Functions.plusMult(-f));
        }


        for (int i = 0; i <= high; i++) {
          double f = ortPiece.dot(hessenBerg.viewRow(i).viewPart(m, high - m + 1)) / h;
          hessenBerg.viewRow(i).viewPart(m, high - m + 1).assign(ortPiece, Functions.plusMult(-f));

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Examples of org.apache.mahout.math.Matrix.viewColumn()

    v.assign(0);
    v.viewDiagonal().assign(1);


    for (int m = high - 1; m >= low + 1; m--) {
      if (hessenBerg.getQuick(m, m - 1) != 0.0) {
        ort.viewPart(m + 1, high - m).assign(hessenBerg.viewColumn(m - 1).viewPart(m + 1, high - m));
        for (int j = m; j <= high; j++) {
          double g = ort.viewPart(m, high - m + 1).dot(v.viewColumn(j).viewPart(m, high - m + 1));
          // Double division avoids possible underflow
          g = g / ort.getQuick(m) / hessenBerg.getQuick(m, m - 1);
          v.viewColumn(j).viewPart(m, high - m + 1).assign(ort.viewPart(m, high - m + 1), Functions.plusMult(g));

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Examples of org.apache.mahout.math.Matrix.viewColumn()

    endTime(TimingSection.TRIDIAG_DECOMP);
    startTime(TimingSection.FINAL_EIGEN_CREATE);
    for (int row = 0; row < i; row++) {
      Vector realEigen = null;


      Vector ejCol = eigenVects.viewColumn(row);
      int size = Math.min(ejCol.size(), state.getBasisSize());
      for (int j = 0; j < size; j++) {
        double d = ejCol.get(j);
        Vector rowJ = state.getBasisVector(j);
        if (realEigen == null) {

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Examples of org.apache.mahout.math.Matrix.viewColumn()


    for (int m = low + 1; m <= high - 1; m++) {


      // Scale column.


      final Vector hColumn = hessenBerg.viewColumn(m - 1).viewPart(m, high - m + 1);
      double scale = hColumn.norm(1);


      if (scale != 0.0) {
        // Compute Householder transformation.

View Full Code Here

Examples of org.apache.mahout.math.Matrix.viewColumn()

        // Apply Householder similarity transformation
        // H = (I-u*u'/h)*H*(I-u*u')/h)


        Vector ortPiece = ort.viewPart(m, high - m + 1);
        for (int j = m; j < n; j++) {
          double f = ortPiece.dot(hessenBerg.viewColumn(j).viewPart(m, high - m + 1)) / h;
          hessenBerg.viewColumn(j).viewPart(m, high - m + 1).assign(ortPiece, Functions.plusMult(-f));
        }


        for (int i = 0; i <= high; i++) {
          double f = ortPiece.dot(hessenBerg.viewRow(i).viewPart(m, high - m + 1)) / h;

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Examples of org.apache.mahout.math.Matrix.viewColumn()

        // H = (I-u*u'/h)*H*(I-u*u')/h)


        Vector ortPiece = ort.viewPart(m, high - m + 1);
        for (int j = m; j < n; j++) {
          double f = ortPiece.dot(hessenBerg.viewColumn(j).viewPart(m, high - m + 1)) / h;
          hessenBerg.viewColumn(j).viewPart(m, high - m + 1).assign(ortPiece, Functions.plusMult(-f));
        }


        for (int i = 0; i <= high; i++) {
          double f = ortPiece.dot(hessenBerg.viewRow(i).viewPart(m, high - m + 1)) / h;
          hessenBerg.viewRow(i).viewPart(m, high - m + 1).assign(ortPiece, Functions.plusMult(-f));

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Examples of org.apache.mahout.math.Matrix.viewColumn()

    v.assign(0);
    v.viewDiagonal().assign(1);


    for (int m = high - 1; m >= low + 1; m--) {
      if (hessenBerg.getQuick(m, m - 1) != 0.0) {
        ort.viewPart(m + 1, high - m).assign(hessenBerg.viewColumn(m - 1).viewPart(m + 1, high - m));
        for (int j = m; j <= high; j++) {
          double g = ort.viewPart(m, high - m + 1).dot(v.viewColumn(j).viewPart(m, high - m + 1));
          // Double division avoids possible underflow
          g = (g / ort.getQuick(m)) / hessenBerg.getQuick(m, m - 1);
          v.viewColumn(j).viewPart(m, high - m + 1).assign(ort.viewPart(m, high - m + 1), Functions.plusMult(g));

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Examples of org.apache.mahout.math.Matrix.viewColumn()

    endTime(TimingSection.TRIDIAG_DECOMP);
    startTime(TimingSection.FINAL_EIGEN_CREATE);
    for (int row = 0; row < i; row++) {
      Vector realEigen = null;
      // the eigenvectors live as columns of V, in reverse order.  Weird but true.
      Vector ejCol = eigenVects.viewColumn(i - row - 1);
      int size = Math.min(ejCol.size(), state.getBasisSize());
      for (int j = 0; j < size; j++) {
        double d = ejCol.get(j);
        Vector rowJ = state.getBasisVector(j);
        if (realEigen == null) {

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