Matrix Elements VB-800 Manual de usuario Pagina 61

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A2.5 Ox exported mathematics functions 53
Description
Returns TRUE if the argument is infinity (.Inf) or not-a-number (.NaN) respec-
tively.
FPeriodogram, FPeriodogramAcf
bool FPeriodogram(VECTOR vX, int cT, int iTrunc, int cS,
VECTOR vS, int iMode);
bool FPeriodogramAcf(VECTOR vAcf, int cT, int iTrunc, int cS1,
VECTOR vS, int iMode, int cTwin)
vX[cT] in: variable of which to compute correlogram
cT in: number of observations, T
iTrunc in: truncation parameter m
cS in: no of points at which to evaluate spectrum
vS[cS] out: periodogram
iMode in: 0: (truncated) periodogram,
1: smoothed periodogram using Parzen window,
2: estimated spectral density using Parzen window (as option
1, but divided by c(0)).
vAcf[cT] in: ACF
out: overwritten by weighted ACF
cS1 in: > 0: no of points at which to evaluate spectrum 0:using
all points with window 2π/cTwin
Return value
Returns TRUE if successful, FALSE if out of memory.
FPPtDec
bool FPPtDec(MATRIX mA, int cA)
mA[cA][cA] in: symmetric p.d. matrix to be decomposed
out: contains P
Return value
TRUE: no error;
FALSE: Choleski decomposition failed.
Description
Computes the Choleski decomposition of a symmetric pd matrix A: A = PP
0
.
P has zeros above the diagonal.
IDecQRt...
int IDecQRt(MATRIX mXt, int cX, int cT, int *piPiv, int *pcR);
int IDecQRtEx(MATRIX mXt, int cX, int cT, int *piPiv, VECTOR vTau);
int IDecQRtRank(MATRIX mQt, int cX, int cT, int *pcR);
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