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lmixpar
2011 Feb 23
0
Over-constrained? gamma mixtures using R: mix{mixdist}
...=
NULL, size = NULL))
If I allow any one of the 4 constrained parameters to become
unconstrained then the model runs and gives sensible results but if I
constrain all four parameters then I get the following error.
"Error in nlm(multineg2llg, mulpseudomixdat = mspseudomixdat, mulmixpar
= msmixpar, :
invalid parameter length"
My hunch is that this is not a data-specific issue but something to do
with over-constraining the model but I can't see why and I can't find
this question having been asked before.
Please can you advise me why this is a problem and whether there is a...