Examples of cern.colt.matrix.DoubleMatrix2D.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)

  
  for (int c = columnIndexes.length; --c >= 0; ) {
    int column = columnIndexes[c];
    if (column < 0 || column >= columns)
      throw new IndexOutOfBoundsException("Illegal Index");
    sub.viewColumn(c).assign(A.viewColumn(column));
  }
  return sub;
}
/**
Constructs and returns a new <i>sub-range view</i> which is the sub matrix <tt>A[fromRow..toRow,fromColumn..toColumn]</tt>.

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  for (int k = n-1; k >= 0; k--) {
    DoubleMatrix1D QRcolk = QR.viewColumn(k).viewPart(k,m-k);
    Q.setQuick(k,k, 1);
    for (int j = k; j < n; j++) {
      if (QR.getQuick(k,k) != 0) {
        DoubleMatrix1D Qcolj = Q.viewColumn(j).viewPart(k,m-k);
        double s = QRcolk.zDotProduct(Qcolj);
        s = -s / QR.getQuick(k,k);
        Qcolj.assign(QRcolk, F.plusMult(s));
      }
    }

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  for (int c = columnIndexes.length; --c >= 0; ) {
    int column = columnIndexes[c];
    if (column < 0 || column >= columns)
      throw new IndexOutOfBoundsException("Illegal Index");
    sub.viewColumn(c).assign(A.viewColumn(column));
  }
  return sub;
}
/**
Constructs and returns a new <i>sub-range view</i> which is the sub matrix <tt>A[fromRow..toRow,fromColumn..toColumn]</tt>.

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      DoubleMatrix2D coltN = DoubleFactory2D.dense.make(N);
      DoubleMatrix2D coltD = DoubleFactory2D.dense.make(D);
      DoubleMatrix2D coltP;
      coltP = Algebra.ZERO.solve(coltN, coltD);


      return new BSpline(coltP.viewColumn(0).toArray(), coltP.viewColumn(1).toArray(), U);
   }




   /**
    * Returns a B-spline curve of degree <TT>degree</TT> smoothing

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      DoubleMatrix2D coltN = DoubleFactory2D.dense.make(N);
      DoubleMatrix2D coltD = DoubleFactory2D.dense.make(D);
      DoubleMatrix2D coltP;
      coltP = Algebra.ZERO.solve(coltN, coltD);


      return new BSpline(coltP.viewColumn(0).toArray(), coltP.viewColumn(1).toArray(), U);
   }




   /**
    * Returns a B-spline curve of degree <TT>degree</TT> smoothing

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      DoubleMatrix2D coltQ = DoubleFactory2D.dense.make(Q);
      DoubleMatrix2D coltN = Algebra.ZERO.subMatrix(DoubleFactory2D.dense.make(N), 1, x.length-1, 1, h-1).copy();
      DoubleMatrix2D coltM = Algebra.ZERO.mult(Algebra.ZERO.transpose(coltN), coltN);
      DoubleMatrix2D coltP;
      coltP = Algebra.ZERO.solve(coltM, coltQ);
      double[] pxTemp = coltP.viewColumn(0).toArray();
      double[] pyTemp = coltP.viewColumn(1).toArray();
      double[] px = new double[h+1];
      double[] py = new double[h+1];
      px[0] = D[0][0];
      py[0] = D[0][1];

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      DoubleMatrix2D coltN = Algebra.ZERO.subMatrix(DoubleFactory2D.dense.make(N), 1, x.length-1, 1, h-1).copy();
      DoubleMatrix2D coltM = Algebra.ZERO.mult(Algebra.ZERO.transpose(coltN), coltN);
      DoubleMatrix2D coltP;
      coltP = Algebra.ZERO.solve(coltM, coltQ);
      double[] pxTemp = coltP.viewColumn(0).toArray();
      double[] pyTemp = coltP.viewColumn(1).toArray();
      double[] px = new double[h+1];
      double[] py = new double[h+1];
      px[0] = D[0][0];
      py[0] = D[0][1];
      px[h] = D[D.length-1][0];

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            u.setQuick (i, j, v);
            v *= x[i];
         }
      }
      final DoubleMatrix2D yMat = new DenseDoubleMatrix2D (x.length, 1);
      yMat.viewColumn (0).assign (y);
      final DoubleMatrix2D bMat = alg.solve (u, yMat);
      return bMat.viewColumn (0).toArray ();
   }

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         }
      }
      final DoubleMatrix2D yMat = new DenseDoubleMatrix2D (x.length, 1);
      yMat.viewColumn (0).assign (y);
      final DoubleMatrix2D bMat = alg.solve (u, yMat);
      return bMat.viewColumn (0).toArray ();
   }




   /**
    * Returns the <SPAN CLASS="MATH"><I>x</I></SPAN> coordinates of the interpolated points.

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            A.setQuick (i, j, xSums[d]);
         }
         B.setQuick (i, 0, xySums[i]);
      }
      final DoubleMatrix2D aVec = alg.solve (A, B);
      return aVec.viewColumn (0).toArray ();
   }




   /**
    * Returns the <SPAN CLASS="MATH"><I>x</I></SPAN> coordinates of the fitted points.

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