# coef: Extract, set, or alter coefficients In pomp: Statistical Inference for Partially Observed Markov Processes

 coef R Documentation

## Extract, set, or alter coefficients

### Description

Extract, set, or modify the estimated parameters from a fitted model.

### Usage

``````## S4 method for signature 'listie'
coef(object, ...)

## S4 method for signature 'pomp'
coef(object, pars, transform = FALSE, ...)

## S4 replacement method for signature 'pomp'
coef(object, pars, transform = FALSE, ...) <- value

## S4 method for signature 'objfun'
coef(object, ...)

## S4 replacement method for signature 'objfun'
coef(object, pars, transform = FALSE, ...) <- value
``````

### Arguments

 `object` an object of class ‘pomp’, or of a class extending ‘pomp’ `...` ignored or passed to the more primitive function `pars` optional character; names of parameters to be retrieved or set. `transform` logical; perform parameter transformation? `value` numeric vector or list; values to be assigned. If `value = NULL`, the parameters are unset.

### Details

`coef` allows one to extract the parameters from a fitted model.

`coef(object,transform=TRUE)` returns the parameters transformed onto the estimation scale.

`coef(object) <- value` sets or alters the coefficients of a ‘pomp’ object.

`coef(object,transform=TRUE) <- value` assumes that `value` is on the estimation scale, and applies the “from estimation scale” parameter transformation from `object` before altering the coefficients.

Other extraction methods: `cond_logLik()`, `covmat()`, `eff_sample_size()`, `filter_mean()`, `filter_traj()`, `forecast()`, `logLik`, `obs()`, `pred_mean()`, `pred_var()`, `saved_states()`, `spy()`, `states()`, `summary()`, `timezero()`, `time()`, `traces()`