R: Verify if a state j is reachable from state i.

is.accessible {markovchain} | R Documentation

## Verify if a state j is reachable from state i.

### Description

This function verifies if a state is reachable from another, i.e., if there exists a path that leads to state j leaving from state i with positive probability

### Usage

    is.accessible(object, from, to)

### Arguments

`object` | A `markovchain` object.
`from` | The name of state "i" (beginning state).
`to` | The name of state "j" (ending state).

### Details

It wraps an internal function named `reachabilityMatrix`.

### Value

A boolean value.

### Author(s)

Giorgio Spedicato, Ignacio Cordón

### References

James Montgomery, University of Madison

### See Also

`is.irreducible`

### Examples

    statesNames <- c("a", "b", "c")
    markovB <- new("markovchain", states = statesNames,
                   transitionMatrix = matrix(c(0.2, 0.5, 0.3,
                                                 0,   1,   0,
                                               0.1, 0.8, 0.1), nrow = 3, byrow = TRUE,
                                             dimnames = list(statesNames, statesNames)
                                            )
                   )
    is.accessible(markovB, "a", "c")

[Package markovchain version 0.8.6 Index]