Essential Graphing > Scatterplot 3D > Scatterplot 3D Platform Options
Publication date: 11/29/2021

# Scatterplot 3D Platform Options

The red triangle menu next to Scatterplot 3D contains options to customize the display and to compute, rotate, and save principal or rotated components.

Show Points

Shows or hides the data points on the graph.

Show Controls

Shows or hides the source and axis controls displayed beneath the 3D scatterplot (Figure 9.4).

Drop Lines

Draws lines from each point to the plane created by the x and z variables that you selected on the launch window.

Connect Points

Connects the points with a line. Points can be connected on the data as a whole or in groups. You can also group data by a specific variable.

Jitter

Displays small spaces between the data points so that you can see each point more clearly.

Normal Contour Ellipsoids

Draws one or more normal contour ellipsoids, that is, three-dimensional ellipses that encompass a specified portion of points. You specify whether you want an ellipsoid for all of the data or for each group. You can also control the size and transparency of the ellipsoids. See Normal Contour Ellipsoids.

Ellipsoid Coverage

Changes the size of normal contour ellipsoids. Type a value between 0 and 1, where the greater the value creates a bigger the ellipsoid. The actual values “0” and “1” produce no ellipsoid, so a warning appears if you try to use those values.

This option only appears after you add a normal contour ellipsoid to the 3D scatterplot.

Ellipsoid Transparency

Changes the surface of normal contour ellipsoids. The greater the value, the more opaque the ellipsoid. This option only appears after you add a normal contour ellipsoid to the 3D scatterplot.

Nonpar Density Contour

Draws nonparametric density contours, which approximately encompass a specified proportion of the points. You specify whether you want a density contour for all of the data or for each group. See Nonparametric Density Contours.

Drop Line Thickness

Changes the width of drop lines. This option only appears after you add drop lines to the 3D scatterplot.

Principal Components

Calculates principal components on all variables. This changes the axes of the plot to have principal component scores.

Biplot rays are displayed by default. You can remove them by selecting Biplot Rays from the red triangle menu. For more information about principal components, see Principal Components in Multivariate Methods.

Std Prin Components

Calculates principal components (as with the Principal Components option) but scales the principal component scores to have unit variance. If this option is not selected, the scores have variance equal to the corresponding eigenvalue.

With standardized principal components, the correlation between the variables and the principal component scores is equal to the values in the eigenvector. This helps you quickly assess the relative importance of the variables. See Principal Components in Multivariate Methods.

Select this option if you want GH' rather than JK' biplots. GH' biplots try to preserve relationships between variables; JK' biplots try to preserve relationships between observations. The interpoint distance shown by GH' biplots is less meaningful, but the angles of the GH' biplot rays measure correlations better.

Rotated Components

Specifies the number of factors that you want to rotate and the rotation method. You rotate components to better align the directions of the factors with the original variables so that the factors might be more interpretable. See Principal Components in Multivariate Methods.

Biplot Rays

Shows or hides biplot rays that correspond to the principal components. You must have already selected Principal Components, Std Prin Components, or Rotated Components for this option to appear.

Show Ray Labels

Shows or hides labels for the biplot rays. You must have already selected Biplot Rays for this option to appear.

Remove Prin Comp

Removes principal components, standardized principal components, and rotated components from the scatterplot 3D report. The 3D scatterplot reverts to its original display before principal components were selected. This option, however, does not remove any saved principal components from the data table.

This option only appears after you add principal, standard, or rotated components to the 3D scatterplot.

Save Prin Components

Saves the specified number of current principal component scores as new columns in the current data table. These columns also include the formulas used for the principal components. For n variables in the components list, n principal component columns are created and named Prin1, Prin2, ... Prinn.

This option only appears after you add principal, standard, or rotated components to the 3D scatterplot.

Save Rotated Components

Saves all rotated component scores as columns in the current data table. These columns also include the formulas that were used. If you requested n rotated components, then n rotated component columns are created and named Rot1, Rot2, ... Rotn.

This option only appears after you add rotated components to the 3D scatterplot.

Local Data Filter

Shows or hides the local data filter that enables you to filter the data used in a specific report.

Redo

Contains options that enable you to repeat or relaunch the analysis. In platforms that support the feature, the Automatic Recalc option immediately reflects the changes that you make to the data table in the corresponding report window.

Save Script

Contains options that enable you to save a script that reproduces the report to several destinations.

Save By-Group Script

Contains options that enable you to save a script that reproduces the platform report for all levels of a By variable to several destinations. Available only when a By variable is specified in the launch window.