Displaying 3 results from an estimated 3 matches for "qdq".
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2004 Mar 11
0
A question about function "cor" in code C
...malayus at hotmail.com
University of Cordoba
(Spain)
_________________________________________________________________
Reparaciones, servicios a domicilio, empresas, profesionales... Todo en la
gu?a telef?nica de QDQ. http://qdq.msn.es/msn.cfm
2011 Dec 13
2
Inverse matrix using eigendecomposition
...igen vectors and eigenvalues
E<-eigen(m, sym=TRUE)
Q<-E$vectors
V<-E$values
n<-nrow(m)
##normalize the eigenvectors
for(i in 1:n){
Q[,i]<-Q[,i]/sqrt(sum(Q[,i]^2))
}
##verify dot product of vectors are orthogonal
sum(Q[,1]*Q[,2])
sum(Q[,1]*Q[,3])
sum(Q[,2]*Q[,3])
##Begin creating QDQ^T matrix. Where Q are orthonormal eigenvectors, and D
is a diagonal matrix with 1/eigenvalues on the diagonal. and Q^T is the
transpose of Q.
R<-t(Q)
D<-mat.or.vec(n,n)
for(i in 1:n) {
D[i,i]<-1/V[i]
}
P<-Q*D*R
## P should be the inverse of the matrix m. Check using
solve(m)
#...
2004 Jul 19
2
8 bit characters and smbmount
...ikbL0OOAJCUBbI3KispnTOSzY51LvOCAsKJ1KjiP0plqfRWHNlx8
+ZJ8Gg/OC7E6WoDTAGLNHAgGVYkwj2q5H0Rq/Ns2bK1G4yad9KMbu+S4lq+pX1tQ
D55KVY8dlrpvxs4NNiS7tEAb2yFxTSei5ylJktwwyhIk0txmyX1V7uJneQ34GoAb
04bmJnKzHm3uB4cUrrZLz4hJBBgRAgAJBQJA2YY9AhsMAAoJENPPz6c0jU7s4VwA
oLnayxxHyC7ZHOem88opcKhotViRAKC1PcY7gNTh2DQ+qZNsUBy+qdq/Ew==
=xtDv
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