PLOT Subcommand (AIM command)

The PLOT subcommand specifies which graphs to produce.

CATEGORY. Within Cluster Percentages. This option displays a clustered bar chart for each categorical variable. The bars represent percentages of categories in each cluster. The cluster marginal count is used as the base for the percentages.

CLUSTER (TYPE=BAR | PIE). Cluster frequency charts. Displays a bar or pie chart, depending upon the option selected, representing the frequency of each level of the grouping variable.

ERRORBAR. Error Bar. This option displays an error bar by group ID for each continuous variable.

IMPORTANCE (X=GROUP | VARIABLE Y=TEST | PVALUE). Attribute Importance. This option displays a bar chart that shows the relative importance of the attributes/variables. The specified options further control the display. X = GROUP causes values of the grouping variable to be displayed on the x axis. A separate chart is produced for each variable. X = VARIABLE causes variable names to be displayed on the x axis. A separate chart is produced for each value of the grouping variable. Y = TEST causes test statistics to be displayed on the y axis. Student’s t statistics are displayed for scale variables, and chi-square statistics are displayed for categorical variables. Y = PVALUE causes p-value-related measures to be displayed on the y axis. Specifically, −log10(pvalue) is shown so that in both cases larger values indicate "more significant" results.

Example: Importance Charts by Group

AIM clu_id
  /CONTINUOUS age work salary
  /CATEGORICAL minority
  /PLOT CATEGORY CLUSTER (TYPE = PIE) IMPORTANCE (X=GROUP Y=TEST).
  • A frequency pie chart is requested.
  • Student’s t statistics are plotted against the group ID for each scale variable, and chi-square statistics are plotted against the group ID for each categorical variable.

Example: Importance Charts by Variable

AIM clu_id
  /CONTINUOUS age work salary
  /CATEGORICAL minority
  /CRITERIA HIDENOTSIG=YES CI=95 ADJUST=NONE
  /PLOT CATEGORY CLUSTER (TYPE = BAR)
             IMPORTANCE (X = VARIABLE, Y = PVALUE).
  • A frequency bar chart is requested.
  • –log10(pvalue) values are plotted against variables, both scale and categorical, for each level of the grouping variable.
  • In addition, bars are not shown if their p values exceed 0.05.