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Class jnt.linear_algebra.QRopt
java.lang.Object

+jnt.linear_algebra.QRopt
 public class QRopt
 extends Object
QR matrix factorization (columnoriented).
Factorize a matrix into a QR form. (Q is orthogonal, R is upper
triangular.)
Like QR.java, but uses aliases rows to contiguous
vectors for more efficient exectuions on JVMs.

QRopt()


factor(double[][], double[])
 Factorize a matrix into a QR form.
QRopt
public QRopt()
factor
public static final void factor(double X[][],
double dr[])
 Factorize a matrix into a QR form. (Q is orthogonal, R is upper
triangular.)
 Parameters:
 X  (in/out) on input, the NxP array is the matrix to be factored.
on output, it holds the QR factorization, in a compact
form.
 dr  (out) main diagonal of R.
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