transM {asbio} R Documentation

## Transition matrix analysis

### Description

Creates a plot showing expected numbers of individuals in specified age classes or life stages given survivorship probabilities from a transition matrix (cf. Caswell 2000). The function `anm.transM` provides an animated view of the population growth curves. The function `anm.TM.tck` provides a tcltk GUI to run `anm.TM.tck`.

### Usage

```transM(A, init, inter = 100, stage.names = c("All grps",1:(ncol(A))),
leg.room = 1.5, ...)

anm.transM(A,init,inter=100,stage.names =c("All grps",1:(ncol(A))),
leg.room = 1.5, anim.interval=0.1,...)

anm.TM.tck()
```

### Arguments

 `A` Transition matrix containing survivorship probabilities and fecundities see Caswell (2000). `init` A numeric vector containing initial numbers in each age class of interest. `inter` Number of time intervals for which population numbers are to be calculated. `stage.names` A character vector giving life stage names. `leg.room` A Y-axis multiplier intended to create room for a legend. `anim.interval` Speed of animation in frames per second. `...` Additional arguments for `plot`

### Value

Returns a plot and proportions of the population in each age class for the number of time intervals in `inter`.

Ken Aho

### References

Caswell, H (2000) Matrix Population Models: Construction, Analysis and Interpretation, 2nd Edition. Sinauer Associates, Sunderland, Massachusetts.

Gurevitch, J., Scheiner, S. M., and G. A. Fox (2006) The Ecology of Plants. Sinauer.

### Examples

```#Endangered cactus data data from Gurevitch et al. (2006)
A<-matrix(nrow=3,ncol=3,data=c(.672,0,.561,0.018,0.849,0,0,0.138,0.969),
byrow=TRUE)
init<-c(10,2,1)