Jampack
Class Pivot
java.lang.Object
Jampack.Pivot
public class Pivot
- extends java.lang.Object
Pivot applys a sequence of pivot operations to the
rows of a matrix. The pivot sequence is contained
in an integer array pvt[], which determines a permution
as follows:
for (k=0; k<pvt.length; k++)
swap k and pvt[k];
Both k and pvt[k] represent zero-based references
to the rows of the matrix.
Pivot also has a method to apply the inverse permutation.
Comments: Column pivoting will be added later.
- Version:
- Pre-alpha
- Author:
- G. W. Stewart
Constructor Summary |
Pivot()
|
Method Summary |
static Zmat |
row(Zmat A,
int[] pvt)
Pivots the rows of a Zmat (altered) as specified by a pivot array. |
static Zmat |
rowi(Zmat A,
int[] pvt)
Pivots the rows of a Zmat (altered) as in the inverse order specified
by a pivot array. |
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Pivot
public Pivot()
row
public static Zmat row(Zmat A,
int[] pvt)
throws JampackException
- Pivots the rows of a Zmat (altered) as specified by a pivot array.
- Parameters:
A
- The Zmat (altered)pvt
- The pivot array
- Returns:
- The Zmat A with its rows permuted
- Throws:
JampackException
- Thrown for inconsistent dimensions.
rowi
public static Zmat rowi(Zmat A,
int[] pvt)
throws JampackException
- Pivots the rows of a Zmat (altered) as in the inverse order specified
by a pivot array.
- Parameters:
A
- The Zmat (altered)pvt
- The pivot array
- Returns:
- The Zmat A with its rows permuted
- Throws:
JampackException
- Thrown for inconsitent dimensions.