Specify the binning for each numeric attribute. This page displays the numeric attributes; for each attribute, it displays the name, the average, the maximum, the minimum for the attribute, and the discretization strategy currently in effect for the attribute (under the heading Transformation).
If the Discretization wizard is launched from a Mining Activity, a default binning strategy is selected for you. If the wizard is invoked directly, there is no default binning strategy unless you request one.
You define a binning strategy for one or more attributes at a time. You can specify the Equal Width or Quantile strategy for more than one attribute at a time. You must specify custom binning for one attribute at a time.
To generate a recommended default strategy based on the algorithm that you intend to use, click Default. You can modify this strategy, if you wish.
To define a binning strategy for a set of attributes, select the attribute or attributes.
To see a histogram for an attribute, select the attribute, and click Histogram; a histogram and some statistics are displayed for the attribute. If the attribute was unbinned, the default binning strategy is applied, and the attribute is marked as Binned when you close the Histogram dialog box.
Once an attribute is binned, the Transformation column indicates the type of binning applied to the attribute.
You can select one of the following binning strategies for the selected attributes:
To erase the binning strategies for a set of attributes, select the attributes. Click Clear to remove the binning strategies. You can now redefine the strategies. You can also change strategies one attribute at a time. Suppose, for example, that an attribute has the Equal Width strategy with 10 bins and you wish to change the number of bins to 5. Select the attribute, and click Equal Width. Change the number of bins from 10 to 5, and click OK. You can click Histogram to view the change.
When you are done defining binning strategies, click Next to continue.
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