# Matrixplot of groups similarities

### Description

This calclulates and plots average similarities of rows (releves) in a square, classified matrix. Correlation coefficient is used as similarity, upon plotting proportionas to the surface of circles. Hence, diagonal elements exhibit similarity of groups, off-diagonals all similarities to the remaining groups.

### Usage

1 2 3 4 5 6 7 |

### Arguments

`veg` |
This is a vegetation data frame, releves are rows, species columns |

`rmember` |
Group membership of the rows or columns, typically taken from cluster analysis |

`use` |
Either "rows" or "columns" |

`y` |
Transformation of species scores: x'= x exp(y) |

`...` |
Capacity. Adjusts plot size to the number of groups. |

`x` |
An object of class "mxplot" |

`capacity` |
The number of group symbols that fit on one page |

### Details

The distance measure used is "correlation used as distance". See reference.

### Value

An object of class "mxplot" with at least the following items:

` order ` |
Dimension of the similarity matrix (equal to the number of groups ng) |

` mmatrix ` |
The ng x ng matrix of average group similarity |

` levels ` |
The ng group names (a vector of character variables) |

### Note

Plot parameter capacity only affects the format of plot. Just try.

### Author(s)

Otto Wildi

### References

Wildi, O. 2013. Data Analysis in Vegetation Ecology. 2nd ed. Wiley-Blackwell, Chichester.

### Examples

1 2 3 4 5 6 7 |