Description Usage Arguments Details Value Examples

View source: R/demography_dynamics-class.R

A `demography_dynamics`

object is used to modify life-stage transition
matrices - for example, adding stochasticity.

1 2 3 4 5 6 | ```
demography_dynamics(...)
is.demography_dynamics(x)
## S3 method for class 'demography_dynamics'
print(x, ...)
``` |

`...` |
Functions that operates on a state object to change demography at specified timesteps. A user may enter custom functions or select pre-defined modules - see examples. |

`x` |
A |

A `demography_dynamics`

object is a sub-component of a dynamics
object and is executed in each timestep of a simulation. Note, some dynamics
functions can be executed at non-regular intervals (i.e. only timesteps
explicitly defined by the user). The `build_demography_dynamics`

function is
used to construct a demography dynamics object consisting of several demographic
dynamics functions and their associated parameters. These functions specify how
the demography in the state object will be modified throughout a simulation.

An object of class `demography_dynamics`

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | ```
library(steps)
library(raster)
# Select existing dynamic functions to be run on the demography
# in a simulation and specify input parameters:
env_stoch <- environmental_stochasticity(transition_matrix = egk_mat,
stochasticity = 0.5)
dem_dens <- density_dependence(transition_matrix = egk_mat)
# Construct a demography dynamics object
dem_dynamics <- demography_dynamics(env_stoch, dem_dens)
# Test if object is of the type 'demography_dynamics'
is.demography_dynamics(test_demo_dynamics)
# Print details about the 'demography_dynamics' object
print(test_demo_dynamics)
``` |

skiptoniam/steps documentation built on Sept. 26, 2018, 5:18 p.m.

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