Note: XLISP-STAT doesn't read but the left button of the mouse, so no right-button or middle-button actions are used. We use Shift-click or Ctrl-click instead. These combinations mean holding the Shift (or Control) key on your keyboard down and then click with the mouse button.
At the right of the Biplot window, there are several buttons that provide menus or tools to modify the Biplot. Some quick description of these tools is provided here.
It includes the items for several kinds of output the window can produce:
The Info tool gives information on the elements (points, arrows, labels, axis)
of the graph.
When pointing to any element some brief info appears on the message area.
Clicking on the element provides more detailed information on it.
Clicking for Info in an arrow or label produces also a text window with similar information for the variable. See section 5.3 on how to use these simple text windows.
Clicking for Info on the axis produces a dialog window to specify how the axis are to be placed and drawn. The dialog is discussed in next section.
When pointing into the low or left end of the plot, an info string on the variance/variability of each dimension is shown in the message area. When pointing onto an empty part of the graph, a short info string about the main properties of the biplot is shown in the message area. Clicking into an empty part of the graph will raise up a dialog window to generate a report with more complete information about the biplot, like using the Save biplot report... item in the Save... menu (see 4.3.2).
The Edit tool is for editing elements of the graph or the biplot itself.
As shown in the message area, while the Edit tool is active, any click in the graph raises up a dialog to modify some aspect of the graph. A click in any point or arrow will allow editing that point or arrow, that is to specify its
graphical properties and appearance.
To change properties for all points, edit any point and select 'Apply to all points' in the edit dialog. To change properties of some points, use first the Select tool to select them, and then Edit them by clicking on any of them and choosing 'Apply to selected points'. Similar tricks work for arrows and labels.
Clicking into the plot area but over no point and no arrow, will raise up the "Change biplot type" dialog as described in 5.2.1. Clicking outside the plot area will raise up the "Data processing" dialog, see also 5.2.1.
Use the select tool to select/unselect points, arrows or labels. After selecting this tool, any click on a point, arrow or label will Select it. Selected elements are displayed in green color and are shown as selected on any data window open from the Biplot button.
Selecting elements is also useful to edit them at once, as commented in the previous section.
To unselect any element, click again on it. To unselect all the selected elements, click in any free part of the graph (while the Select toll is in use).
If there is any data window open (as resulting from choosing the corresponding items in the Biplot... menu) selected points or arrows will also appear highlighted in the data window, and it is also possible to select them by clicking cells in the data window. (See 5.4).
The MOVE tool is for moving some elements of the Biplot. Labels can be freely placed by clicking and dragging it with this tool. Once a label has been moved by the user, automatic placement of this label is deactivated.
Arrow lengths can be changed the same way, clicking and dragging an the arrow end. This will change the length of all arrows without modifying the relative lengths. To modify a single arrow length (this is not recommended), shift-click on any arrow end and drag. Shift-click means holding the shift key and clicking with the mouse. (MS-Windows version: Ctrl-click instead).
The COORDS tool shows coordinates of the mouse position when a click is done.
When you click on the 'Help' button in the toolbar, the window enters the Help Mode. This means that from now on, until another click is made on the same button, the mouse only may be used to get help on different parts of the Biplot window. For example, you may choose an item from the "Save..." button, and the help window will show some help on its use.
When getting info on points or variables, or when generating a Biplot report, the results are shown in text windows. These are windows made only to display text, but some useful tasks are accessible trough its menu. The menu is pop up simply by any click on the window in the MS-Windows version, it is accessible in the upper part of the window under Unix/X11.
Items available are:
When asking for original or transformed data through the "Biplot" button in the Biplot window toolbar, a data sheet window is open.
These windows are only for displaying data and selecting cases/variables. If you want to have these data saved, use "Save Biplot report" from the "Save..." button.
By clicking in the data table, you may select a whole column (click in its header), a whole row (click on its header), or both (click in any cell of the table). To deselect a column or a row, click again in its header. To deselect all selected cells, click on the upper left corner of the table.
Once a column (row) is selected, its corresponding arrow (point) in the graph is also selected. This make easy to visually connect numbers to the graphic.
Clicking and dragging the vertical segment between column headers allows you to change column widths.