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revision 2136, Mon Mar 17 22:20:29 2008 UTC  revision 2137, Mon Mar 17 22:21:24 2008 UTC  

#  Line 128  Line 128 
128   examples for solve( Cholesky(.), b, system = c("A", "LDLt"....))   examples for solve( Cholesky(.), b, system = c("A", "LDLt"....)) 
129  probably rather in man/CHMfactorclass.Rd than man/Cholesky.Rd  probably rather in man/CHMfactorclass.Rd than man/Cholesky.Rd 
130  
131   LDL(<CHMsimpl>) looks relatively easy; via "tCsparse_diag()"  
132  {diagonal entries of *triangular* Csparse}  
133  > see comment in determinant(<dsC>) in R/dsCMatrix.R, will give  
134  faster determinant  
135  
136   Cholesky() generalized: provide R interface cholmod_factorize_p()  
137  which factorizes A + beta*I ==> R interface to fast detA + b*I  
138  
139   tr(A %*% B) {and even tr(A %*% B %*% C) ...} are also needed   tr(A %*% B) {and even tr(A %*% B %*% C) ...} are also needed 
140  frequently in some computations {conditional normal distr. ...}.  frequently in some computations {conditional normal distr. ...}. 
141  Since this can be done faster than by  Since this can be done faster than by 

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