Use this to select options and output to be used by canonical correspondence analysis.

## Display

Specifies which items of output are to be displayed in the Output winndow.

Variance |
The fraction of the variance of the response variates associated with each eigenvalue |

Eigenvalues |
The eigenvalues of the fitted values (also known as the species scores) |

Eigenvectors |
The eigenvectors associated with each eigenvalue |

Species scores |
The species scores from the analysis |

Site scores |
The site scores of the response variables (i.e. the ordination of the units in the response variable (Y) space |

Fitted site scores |
The fitted site scores of the fitted values of the response variables (i.e. the ordination of the units in the response variable space) |

Correlations |
The correlation between the site scores and the explanatory variables |

Fitted correlations |
The correlation between the fitted site scores and the explanatory variables |

## Normalize

Specifies whether the data should be normalized to have unit sums-of-squares before analysis.

X (explanatory variables) |
Normalizes the explanatory variables (X-variates) |

Y (response variables) |
Normalizes the response variables (Y-variates) |

Z (conditioning variables) |
Normalizes the conditioning variables (Z-variates) |

## Number of dimensions

Specifies the number of eigenvalues and eigenvectors to include in output. If this is left blank then all eigenvalues and eigenvectors will be displayed.

## Scaling

Controls scaling for species or site scores. When selected, the species or site scores are multiplied by their corresponding eigenvalues.

## Tolerance for detecting non-zero eigenvalues

Specifies a threshold for the detection of non-zero eigenvalues. An eigenvalue is taken to be non-zero if is it greater than tolerance multiplied by the total variance.

## Action Icons

Clear |
Clear all fields and list boxes. | |

Help |
Open the Help topic for this dialog. |

## See also

- Canonical correspondence analysis menu for canonical correspondence analysis (CCA) and partial CCA
- CCA procedure in command mode