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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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CLUSTER 239<br />

• This example displays cluster membership for each case for the three-, four-, and fivecluster<br />

solutions.<br />

PLOT Subcommand<br />

PLOT controls the plots produced for each method specified on the METHOD subcommand.<br />

For icicle plots, PLOT allows you to control the cluster solution at which the plot begins and<br />

ends and the increment for displaying intermediate cluster solutions.<br />

• If the PLOT subcommand is omitted or included without specifications, a vertical icicle<br />

plot is produced.<br />

• If any keywords are specified on PLOT, only those plots requested are produced.<br />

• The icicle plots are generated as pivot tables and the dendrogram is generated as text<br />

output.<br />

• If there is not enough memory for a dendrogram or an icicle plot, the plot is skipped and<br />

a warning is issued.<br />

• The size of an icicle plot can be controlled by specifying range values or an increment for<br />

VICICLE or HICICLE. Smaller plots require significantly less workspace and time.<br />

VICICLE(min,max,inc) Vertical icicle plot. This is the default. The range specifications are<br />

optional. If used, they must be integer and must be enclosed in<br />

parentheses. The specification min is the cluster solution at which to<br />

start the display (the default is 1), and the specification max is the<br />

cluster solution at which to end the display (the default is the number<br />

of cases minus 1). If max is greater than the number of cases minus 1,<br />

the default is used. The increment to use between cluster solutions is<br />

inc (the default is 1). If max is specified, min must be specified, and<br />

if inc is specified, both min and max must be specified. If VICICLE is<br />

specified more than once, only the last range specification is used.<br />

HICICLE(min,max,inc) Horizontal icicle plot. The range specifications are the same as for<br />

VICICLE. If both VICICLE and HICICLE are specified, the last range<br />

specified is used for both. If a range is not specified on the last instance<br />

of VICICLE or HICICLE, the defaults are used even if a range is specified<br />

earlier.<br />

DENDROGRAM Tree diagram. The dendrogram is scaled by the joining distances of<br />

the clusters.<br />

NONE No plots.<br />

Example<br />

CLUSTER V1 V2 V3 /PLOT=VICICLE(1,20).<br />

• This example produces a vertical icicle plot for the one-cluster through the twenty-cluster<br />

solution.<br />

Example<br />

CLUSTER V1 V2 V3 /PLOT=VICICLE(1,151,5).

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