The NUMCLUSTERS subcommand specifies the number of clusters into which the data will
be partitioned.
AUTO Automatic selection of the number of clusters. Under AUTO, you may specify
a maximum number of possible clusters. TWOSTEP CLUSTER will search for
the best number of clusters between 1 and the maximum using the criterion
that you specify. The criterion for deciding the number of clusters can be
either the Bayesian Information Criterion (BIC) or Akaike Information Criterion
(AIC). TWOSTEP CLUSTER will find at least one cluster if the AUTO
keyword is given.
FIXED User-specified number of clusters. Specify a positive integer
Examples
TWOSTEP CLUSTER
/CONTINUOUS VARIABLES = INCOME
/CATEGORICAL VARIABLES = GENDER RACE
/NUMCLUSTERS AUTO 10 AIC
/PRINT SUMMARY COUNT.
TWOSTEP CLUSTER uses the variables RACE, GENDER and INCOME for clustering. Specifications
on the NUMCLUSTERS subcommand will instruct the procedure to automatically
search for the number of clusters using the Akaike Information Criterion and require the
answer to lie between 1 and 10.
===================================================================
TWOSTEP CLUSTER
/CONTINUOUS VARIABLES = INCOME
/CATEGORICAL VARIABLES = RACE GENDER
/NUMCLUSTERS FIXED 7
/PRINT SUMMARY COUNT.
Here the procedure will find exactly seven clusters.
[此贴子已经被作者于2008-2-13 10:30:52编辑过]
扫码加好友，拉您进群
全部版块
我的主页
收藏
