Minimum Spanning Tree

Select menu: Graphics | Multivariate | Minimum Spanning Tree

This plots an ordination generated from a similarity matrix (using principal coordinates analysis), with the minimum spanning tree superimposed.

After you have imported your data, from the menu select
Graphics | Multivariate | Minimum Spanning Tree.
Fill in the fields as required then click Run.

You can set additional options by clicking the Options and Frame tabs.

Available data

This lists data structures appropriate to the current input field. It lists symmetric matrices for specifying the data. Double-click a name to copy it to the current input field or type the name.

Similarity matrix

Specifies a symmetric matrix containing the data to be plotted. Select the name of the identifier for the data from the Available data list. You can double-click to copy the identifier names across or type the name.

Form similarity matrix

This opens a dialog which can be used to form a similarity matrix from variates and factors containing raw data.

Action buttons

Run	Produce the graph.
Cancel	Close the dialog without further changes.
Defaults	Reset options to their default settings.

Action Icons

	Pin	Controls whether to keep the dialog open when you click Run. When the pin is down the dialog will remain open, otherwise when the pin is up the dialog will close.
	Restore	Restore names into edit fields and default settings.
	Clear	Clear all fields and list boxes.
	Help	Open the Help topic for this dialog.