From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node181.html | 122 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 src/slalib/sun67.htx/node181.html (limited to 'src/slalib/sun67.htx/node181.html') diff --git a/src/slalib/sun67.htx/node181.html b/src/slalib/sun67.htx/node181.html new file mode 100644 index 0000000..76e49b9 --- /dev/null +++ b/src/slalib/sun67.htx/node181.html @@ -0,0 +1,122 @@ + + + + +SLA_SVDCOV - Covariance Matrix from SVD + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_SVDSOL - Solution Vector from SVD +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_SVD - Singular Value Decomposition +

+

+

SLA_SVDCOV - Covariance Matrix from SVD +   +

+
+
ACTION: +
From the W and V matrices from the SVD +factorization of a matrix + (as obtained from the sla_SVD routine), obtain + the covariance matrix. +

CALL: +
CALL sla_SVDCOV (N, NP, NC, W, V, WORK, CVM) +

+

+
GIVEN: +
+
+ + + + + + + + + + + + + + + + + + + + + +
NIn, the number of rows and columns in +matrices W and V
NPIfirst dimension of array containing $n \times n$matrix V
NCIfirst dimension of array CVM
WD(N)$n \times n$ diagonal matrix W +(diagonal elements only)
VD(NP,NP)array containing $n \times n$ orthogonal matrix V
+

+
RETURNED: +
+
+ + + + + + + + + +
WORKD(N)workspace
CVMD(NC,NC)array to receive covariance matrix
+

+
REFERENCE: +
Numerical Recipes, section 14.3. +
+
+ +next + +up + +previous +
+ Next: SLA_SVDSOL - Solution Vector from SVD +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_SVD - Singular Value Decomposition +

+

+

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +
+ + -- cgit