In Variables, enter the columns that contain the measurement data.
You must have two or more numeric columns, with each column representing a different measurement. You must delete rows with missing data from the worksheet before using this procedure. When you have a large data set with many missing values, it may more convenient to subset your worksheet to exclude the rows with missing values, rather than delete each row manually. For more information, go to Overview for Subset Worksheet.
In this worksheet, columns C1 through C4 contain measurements for each variable that describes a characteristic of a company. The Initial column indicates the initial cluster membership for the observations. Notice that only the non-zero values in the Initial column are used to define each initial cluster (1, 2, and 3). The remaining observations with an initial value of 0 are not assigned to an initial cluster but instead are assigned to a cluster during the clustering algorithm process, based on the cluster centroid they are closest to.
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