Spherical-spherical correlation | R Documentation |

Correlation between two spherical variables.

```
spher.cor(x, y)
```

`x` |
A spherical variable. A matrix with thre columns, each row is a unit vector. |

`y` |
A spherical variable. A matrix with thre columns, each row is a unit vector. |

A very similar to the classical correlation is calcualted. In addition, a hypothesis test for no correlation is performed. Note, that this is a squared correlation actually, so negative values will never be returned.

A vector including:

`R-squared` |
The value of the squared correlation. |

`p-value` |
The p-value of the no correlation hypothesis testing. |

Michail Tsagris.

R implementation and documentation: Michail Tsagris mtsagris@uoc.gr and Giorgos Athineou <gioathineou@gmail.com>.

Kanti V. Mardia and Peter E. Jupp. Directional statistics, pg. 254–255.

```
spher.reg, vmf.mle, circ.cor1, circ.cor2
```

```
x <- rvmf(100, rnorm(3), 10)
y <- rvmf(100, rnorm(3), 10)
spher.cor(x, y)
```

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