abm3pc_sys

Third-order Adams-Bashford-Moulton predictor-corrector method.

Fits a state-space mass-balance model for marine ecosystems,
which implements dynamics derived from
'Ecopath with Ecosim' <https://ecopath.org/>
while fitting to time-series of fishery catch, biomass indices,
age-composition samples, and weight-at-age data. Package
'ecostate' fits biological parameters (e.g., equilibrium mass)
and measurement parameters (e.g., catchability coefficients)
jointly with residual variation in process errors, and can include
Bayesian priors for parameters.

James Thorson

ecostate

State-Space Mass-Balance Model for Marine Ecosystems

abm3pc_sys function

<dl><dt>f</dt>
<dd>function in the differential equation \(y' = f(x, y)\);
defined as a function \(R \times R^m \rightarrow R^m\), where \(m\) is the number of equations.</dd>
<dt>a</dt>
<dd>starting time for the interval to integrate</dd>
<dt>b</dt>
<dd>ending time for the interval to integrate.</dd>
<dt>y0</dt>
<dd>starting values at time <code>a</code></dd>
<dt>n</dt>
<dd>number of steps</dd>
<dt>Pars</dt>
<dd>named list of parameters passed to f</dd>
<dt>...</dt>
<dd>additional inputs to function <code>f</code></dd></dl>

Arguments

Adams-Bashford-Moulton for system of equations — abm3pc_sys

<dl>

<dt>f</dt>
<dd>function in the differential equation \(y' = f(x, y)\);
defined as a function \(R \times R^m \rightarrow R^m\), where \(m\) is the number of equations.</dd>


<dt>a</dt>
<dd>starting time for the interval to integrate</dd>


<dt>b</dt>
<dd>ending time for the interval to integrate.</dd>


<dt>y0</dt>
<dd>starting values at time <code>a</code></dd>


<dt>n</dt>
<dd>number of steps</dd>


<dt>Pars</dt>
<dd>named list of parameters passed to f</dd>


<dt>...</dt>
<dd>additional inputs to function <code>f</code></dd>

</dl>

abm3pc_sys: Adams-Bashford-Moulton for system of equations

Description

Usage

Value

Arguments

Details