Data Usage
The wizard displays a list of the possible attributes to discretize.
You can identify attributes as unique, and you can change the data mining type and the data type of attributes.
The following information is displayed:
- Attribute Count: The number of attributes in the table.
- Case Count: The number of cases in the input table.
Attributes Grid
The attributes are displayed in a grid that has the following
columns:
- Name: The name of the attribute.
- Data Type: The data type of the attribute.
- Mining Type: The default value for mining type is determined as follows:
- If the data type of the column is NUMBER or FLOAT, then the mining type is numerical.
- In all other cases, the mining type is categorical.
- For multi-record case (transactional) data, the data type must be NUMBER (preferably an integer type, but precision and/or scale are allowed); the mining type can be either numerical or categorical.
- Unique: If checked, the attribute has a different value for every case.
You can change data mining type, change the data type of numerical attributes, and change the Unique setting, as described in Change Attribute Characteristics.
To view a histogram of an attribute, select the attribute, and click Histogram.
To restore the original mining type defaults for all the attributes in the table, click
Restore.
When you are done, click Next.
Change Attribute Characteristics
You can make the following changes:
- To change mining type, click the Mining Type column for the attribute. Select the new mining type from the dropdown list. Alternatively, select one or more attributes and click Categorical or Numerical, as appropriate.
- To change the Unique status, click the checkbox in the Unique column.
- To cancel changes, select the attribute and click Clear.
You can click the Restore to undo changes.
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