Purpose
=======
DLAZQ3 checks for deflation, computes a shift (TAU) and calls dqds.
In case of failure it changes shifts, and tries again until output
is positive.
Namespace: DotNumerics.LinearAlgebra.CSLapackAssembly: DWSIM.MathOps.DotNumerics (in DWSIM.MathOps.DotNumerics.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax public void Run(
int I0,
ref int N0,
ref double[] Z,
int offset_z,
int PP,
ref double DMIN,
ref double SIGMA,
ref double DESIG,
ref double QMAX,
ref int NFAIL,
ref int ITER,
ref int NDIV,
bool IEEE,
ref int TTYPE,
ref double DMIN1,
ref double DMIN2,
ref double DN,
ref double DN1,
ref double DN2,
ref double TAU
)
Public Sub Run (
I0 As Integer,
ByRef N0 As Integer,
ByRef Z As Double(),
offset_z As Integer,
PP As Integer,
ByRef DMIN As Double,
ByRef SIGMA As Double,
ByRef DESIG As Double,
ByRef QMAX As Double,
ByRef NFAIL As Integer,
ByRef ITER As Integer,
ByRef NDIV As Integer,
IEEE As Boolean,
ByRef TTYPE As Integer,
ByRef DMIN1 As Double,
ByRef DMIN2 As Double,
ByRef DN As Double,
ByRef DN1 As Double,
ByRef DN2 As Double,
ByRef TAU As Double
)
Request Example
View SourceParameters
- I0 Int32
-
(input) INTEGER
First index.
- N0 Int32
-
(input) INTEGER
Last index.
- Z Double
-
(input) DOUBLE PRECISION array, dimension ( 4*N )
Z holds the qd array.
- offset_z Int32
-
- PP Int32
-
(input) INTEGER
PP=0 for ping, PP=1 for pong.
- DMIN Double
-
(output) DOUBLE PRECISION
Minimum value of d.
- SIGMA Double
-
(output) DOUBLE PRECISION
Sum of shifts used in current segment.
- DESIG Double
-
(input/output) DOUBLE PRECISION
Lower order part of SIGMA
- QMAX Double
-
(input) DOUBLE PRECISION
Maximum value of q.
- NFAIL Int32
-
(output) INTEGER
Number of times shift was too big.
- ITER Int32
-
(output) INTEGER
Number of iterations.
- NDIV Int32
-
(output) INTEGER
Number of divisions.
- IEEE Boolean
-
(input) LOGICAL
Flag for IEEE or non IEEE arithmetic (passed to DLASQ5).
- TTYPE Int32
-
(input/output) INTEGER
Shift type. TTYPE is passed as an argument in order to save
its value between calls to DLAZQ3
- DMIN1 Double
-
(input/output) REAL
- DMIN2 Double
-
(input/output) REAL
- DN Double
-
(input/output) REAL
- DN1 Double
-
(input/output) REAL
- DN2 Double
-
(input/output) REAL
- TAU Double
-
(input/output) REAL
These are passed as arguments in order to save their values
between calls to DLAZQ3
See Also