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s may be, for instance, that your sample is very small, or that you are dealing with a model which is ov... rrors does not always work. ~~UP~~ ???? Message "Small/Invalid Pivot" ???? * **Q:** When I run WOMBAT ... often get a message to the screen, saying either small, negative or invalid pivot - What does it mean an

e of the diagonal elements are expected to become small, it is advisable to estimate their log values, th... , as convergence tends to be better without it if small diagonals are not an issue. While WOMBAT does som... automatically switching to log diagonals if very small diagonals are encountered -- performance is gener

not available on your machine, you can download a small program to do so from the web. Alternatively, the... versions of WOMBAT are restricted to a relatively small number of equations (150,000). * The `defaul... ated to any program to something which may be too small for the larger examples to run. You can change th

iders changes between iterates to be sufficiently small. The default convergence criteria employed are f... but progress (i.e. increase in log likelihood) is small and we want to decide whether to stop the run or ... for the last few iterates. Are they consistently small, i.e. less than 0.01 or 0.001 ? - The norm of t

ected FORTRAN code ====== This page gathers some small programs or routines, with **limited** documentat

to 11 if(iopt .and. amax.lt.1.d-5) print *,'small pivot ',ii,dmax ! ... set flag iflag(im

It is targeted at developer teams, workgroups and small companies. It has a simple but powerful [[wiki:sy

programs for WOMBAT ====== This page collects a small number of simple, stand-alone programs to be used