CalculateLikelihoodRatio {EDISON} | R Documentation |

## Calculates the ratio of two likelihoods in a structure move.

### Description

This function calculates the ratio of the liklihoods in a network structure move. The returned value is the ratio for the modification of one edge in one segment.

### Usage

```
CalculateLikelihoodRatio(gamma0, y, Pxlm, Pxl, v0, delta2, dir)
```

### Arguments

`gamma0` |
Hyperparameter. |

`y` |
Target data. |

`Pxlm` |
Projection matrix with modified edge. |

`Pxl` |
Original projection matrix. |

`v0` |
Hyperparameter. |

`delta2` |
Delta squared parameter (signal-to-noise). |

`dir` |
Direction of the change: 1 = Added an edge. 2 = Removed an edge. 0 = No change. |

### Value

Returns the likelihood ratio.

### Author(s)

Frank Dondelinger

### References

For more information about the hyperparameters and the functional form of the likelihood, see:

Dondelinger et al. (2012), "Non-homogeneous dynamic Bayesian networks with Bayesian regularization for inferring gene regulatory networks with gradually time-varying structure", Machine Learning.

### See Also

[Package

*EDISON*version 1.1.1 Index]