SimpleModel Class

This model is an alternative way of computing a variable on a dataset, except that the resulting attribute becomes a primary attribute (see also Section 14.1.1).

The run() method takes the following arguments:

dataset

an object of class Dataset for which the computation is done.

expression

- any variable or expression that can be computed on dataset.

outcome_attribute

- name of the outcome attribute. If it is None (default), alias of the expression is taken.

dataset_pool

- pool of datasets passed into the computation. Default is None.

The run() method computes the given expression on the given dataset. If the outcome_attribute already exists on the dataset, it is deleted. Results from the computation are assigned to outcome_attribute and the attribute is marked as primary. Values of this attribute are returned.