Database Reference
In-Depth Information
Figure 3-17. Setting the attribute names.
13)
In step 4 of the data import wizard, RapidMiner will take its best guess at a
data type
for
each attribute. The data type is the kind of data an attribute holds, such as numeric, text or
date. These can be changed in this screen, but for our purposes in Chapter 3, we will
accept the defaults. Just below each attribute's data type, RapidMiner also indicates a
Role
for each attribute to play. By default, all columns are imported simply with the role of
'attribute', however we can change these here if we know that one attribute is going to play
a specific role in a data mining model that we will create. Since roles can be set within
RapidMiner's main process window when building data mining models, we will accept the
default of 'attribute' whenever we import data sets in exercises in this text. Also, you may
note that the check boxes above each attribute in this window allow you to
not
import
some of the attributes if you don't want to. This is accomplished by simply clearing the
checkbox. Again, attributes can be excluded from models later, so for the purposes of this
text, we will always include all attributes when importing data. All of these functions are
indicated by the black arrows in Figure 3-18. Go ahead and accept these defaults as they
stand and click Next.
