Description Usage Arguments Details Value Author(s) References See Also Examples

It estimates the concentration and the ovalness parameter of some directional data assuming the Kent distribution. The mean direction and major and minor axes are also estimated.

1 | ```
kent.mle(x)
``` |

`x` |
A matrix containing spherical data in Euclidean coordinates. |

The Kent distribution is fitted to some data and its parameters are estimated.

A list including:

`runtime` |
The run time of the procedure. |

`G` |
A 3 x 3 matrix whose first column is the mean direction. The second and third columns are the major and minor axes respectively. |

`para` |
The concentration |

`logcon` |
The logarithm of the normalising constant, using the third type apprxoimation. |

`loglik` |
The value of the log-likelihood. |

Michail Tsagris

R implementation and documentation: Michail Tsagris <[email protected]> and Giorgos Athineou <[email protected]>

Kent John (1982). The Fisher-Bingham distribution on the sphere. Journal of the Royal Statistical Society, Series B, 44(1): 71-80.

```
kent.mle, fb.saddle, vmf, wood.mle
```

1 2 3 4 5 6 7 |

Directional documentation built on March 19, 2018, 5:05 p.m.

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