Missing Values Treatments for Categorical Attributes

he wizard displays missing value treatments for all categorical attributes.

You can either accept the treatments or define new treatments. You can also generate recommended treatments based on the algorithm that you intend to use.

When you are done defining treatments for categorical attributes, click Next.

The attributes are listed in a grid with the following columns:

Default Treatments

To generate recommended missing value treatments based on the mining algorithm that you plan to use, click Defaults and select the algorithm that you plan to use.

Define or Edit Treatments

To define a treatment or to edit an existing treatment, select the attribute and click Transform. You can select one of the following treatments: replace missing values with the mode, replace missing values with a specific custom (constant) value, or drop any rows where this attribute has a missing value.

Note: You cannot specify Drop for all attributes.

Copy and Paste Treatments

To copy a treatment, select an attribute with the treatment and click Copy. To apply the same treatment to other attributes, select the attributes and click Paste.

Histogram

To view a histogram of an attribute, select the attribute and click Histogram.