Questions tagged [starting-values]

Many computational statistical problems (including some estimation problems, such as fitting GLMs) cannot be solved in a single calculation step - their algorithms must be iterated repeatedly until convergence. Such algorithms need starting-values at the beginning of the algorithm.

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29
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3answers
46k views

Why is nls() giving me “singular gradient matrix at initial parameter estimates” errors?

I have some basic data on emission reductions and cost per car: ...
14
votes
5answers
23k views

How to choose initial values for nonlinear least squares fit

The question above says it all. Basically my question is for a generic fitting function (could be arbitrarily complicated) which will be nonlinear in the parameters I am trying to estimate, how does ...