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# Step 2 : the data type definition

The second step of the program is to define the data type. This step allow you to define how your data is coded and has an effect on which models are available in the next step.

Figure 3.3: Definition of the data type.

In all the case you have to give how the missing values are coded. This value can be a number, a string or left empty, in which case the empties cells will be taken as missing values.

Subsections

- Binary type
- Multiple choice type
- Graded type