eigen2
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Contents: Description, Arguments, Usage, Examples, Source Supported Under Version: >1.00
Description Compute eigenvalues and vectors from a set of spectra
Arguments and Return Values Arguments: A numeric array and a number of components Return Value: A structure containing .evecs, .evals, .avg, and .C. where evecs are the eigen vectors, evals are the eigen values, avg is the average and C is the covariance matrix.
Usage Syntax: eigen2($1 = VAR, $2 = INT, [$3 = INT]) $1 - can be any set of vectors or arrays $2 - is the desired number of eigen vectors to be calculated $3 - is an optional number of iterations
Examples dv> a
577x1852x10 array of float, bsq format [42,744,160 bytes]
dv> e=eigen2(a[::20,::100],10)
EV# Iterat. Eigenvalue
---+--------+-----------
1 200 1478489863542.409424
2 200 16311.923112
3 200 32623.846202
4 200 65247.692331
5 200 130495.384501
6 200 260990.768235
7 200 521981.538126
8 200 1043963.053691
9 200 2087926.106279
10 200 4175852.293725
struct, 4 elements
evecs: 10x10x1 array of double, bsq format [800 bytes]
evals: 10x1x1 array of float, bsq format [40 bytes]
avg: 10x1x1 array of double, bsq format [80 bytes]
C: 551x10x1 array of float, bsq format [22,040 bytes]
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Recent Library Changes Created On: 02-15-2006 |
