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e standard errors ???? * **Q:** I am getting a value of ''-1.0'' as standard error for some of my esti... parameters, together with a note that ''Negative values for s.e. indicate failed approximation!''. What ... analyses where some covariance matrices have eigenvalues which are effectively zero. In the latter scenar

tex> denote the corresponding, maximum likelihood value. Partition <latex>\theta</latex> into the vector... {\hat{\boldmath \theta}_{1}}</latex> at the `test values' <latex>{\bf t}</latex>, and the corresponding conditional maximum likelihood value <latex> \log L_{Max}( \hat{\boldmath \theta}_{2} | {\boldmath \t

info> author=Karin Meyer title=Choosing starting values for covariance components </texit> ====== Starting values for covariance components ====== To run WOMBAT, starting values for all matrices of cova... fferent locations or breeds, including literature values. * The more traits are analysed simultaneousl

in column 4. Column 5 finally contains the trait value. As the data file has only one record per individ... iance components to be estimated and the starting values to be used in the iterative estimation scheme. ... s followed by one or more lines with the starting values. * In addition there must be ''VAR'' statem

lose to zero. Note though that in some cases this value might not become close to zero, in particular wit

inal scale. == 1/7/2008 == WOMBAT now checks for values of zero for covariables fitted. If the data contains such values, it expects a 'special' option (see section 4.8 of the manual) telling it whether to ignore such records or treat them as valid values for the covariable. == 16/5/2008 == Added facil

come small, it is advisable to estimate their log values, thus removing any restriction. This parameteris... omitting all principal components with small eigenvalues is generally sufficient to eliminate problems wi... is sequence, derived from the matrix of starting values. It would be easiest to maintain this order for

). | The refresh period defaults to 4 hours. Any value below 10 minutes will be treated as 10 minutes. [

... find diag. element with largest absolute value (pivot) dmax=0.d0; amax=0.d0 do i=1,

acter(len=30) :: arg external getarg ! default value for options verbose=.false. ; degset=.false. ;