Barry D Smith - Population and Ecological Models

Population and Ecological Models

Barry D. Smith, Ph.D.



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1]		Initialize model

2]		Algorithm files (*.alg)

3]		One function call

4]		Minimize with the 'simplex' algorithm

5]		Minimize with Marquardt's algorithm

6]		Calculating covariances

7]		Setting Bayesian prior distributions

8]		Calculating likelihood profiles

9]		Calculating Bayesian posterior distributions

10]		Single model results summary

11]		Multi-model statistics

12]		Quit

Using SmartStats ©

This is an example start-up menu for the statistical models offered on this website.

All statistical models are linked to a parameter estimation and evaluation infrastructure called SmartStats © and use this menu to access SmartStats' © options.

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		1] Initialize model All Visual Basic © statistical models offered on this website begin when the user clicks on 'Initialize model' on the SmartStats © menu form (seen to the right). More...

		2] Algorithm files (*.alg) Algorithm files are text files that retain information on parameter definitions, values, step sizes, etc., for specific models. More...

		3] One function call '1 Function call' calculates the value of the likelihood function for the current parameter estimates of the active model. More...

		4] Minimizing with the 'simplex' algorithm The 'simplex' algorithm undertakes a geometric search for the maximum-likelihood parameter estimates. More...

		5] Minimizing with Marquardt's algorithm Marquardt's algorithm undertakes a derivative-based search for the maximum-likelihood parameter estimates. More...

		6] Calculating covariances(*.cov) Analytical or numerical derivatives are used to calculate the Hessian matrix, which when inverted provides a covariance matrix of the free (i.e., estimated) parameters. More...

		7] Setting Bayesian priors (*.pri) An opportunity is provided to apply a menu of Bayesian prior probability distributions, and their means and variances, to model parameters. More...

		8] Calculating likelihood profiles An opportunity is offered to calculate likelihood profiles for specified parameters. More...

		9] Calculating Bayesian posterior distributions An opportunity is offered to calculate Bayesian posterior distributions for specified parameters. More...

		10] Single model results summary (*.sso) Depending upon how the specific model results were coded for output, a 'Single model results summary' can generally be output and saved as comma delimited text, and/or graphically. More...

		11] Multi-model statistics Competing model fits, for which their associated algorithm and covariance files have been saved, can be ranked, AICc weighted, and their corresponding parameter values and SEs averaged. More...

		12] Quit Choose to end your SmartStats © session. More...