GeneratorMain (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

```
public class GeneratorMain
extends Object
```
Generate a data set according to a given model. Key idea of this generator is to re-generate points if they are more likely to belong to a different cluster than the one they were generated for. The benefit is that we should end up with a data set that follows closely the model that we specified. The drawbacks are that on one hand, specifications might be unsatisfiable. For this a retry count is kept and an UnableToComplyException is thrown when the maximum number of retries is exceeded. On the other hand, the model might not be exactly as specified. When the generator reports an "Density correction factor estimation" that differs from 1.0 this is an indication that the result is not exact. On the third hand, rejecting points introduces effects where one generator can influence others, so random generator results will not be stable with respect to the addition of new dimensions and similar if there are any rejects involved. So this generator is not entirely optimal for generating data sets for scalability tests on the number of dimensions, although if clusters overlap little enough (so that no rejects happen) the results should be as expected.

Fields
Modifier and Type	Field and Description
`protected LinkedList<GeneratorInterface>`	`generators` List of clusters to generate.
`protected boolean`	`testAgainstModel` Controls whether points are tested against the model during generation.

Constructors
Constructor and Description
`GeneratorMain()`

Methods
Modifier and Type	Method and Description
`void`	`addCluster(GeneratorInterface c)` Add a cluster to the cluster list.
`MultipleObjectsBundle`	`generate()` Main loop to generate data set.
`List<GeneratorInterface>`	`getGenerators()` Access the generators.
`boolean`	`isTestAgainstModel()` Return value of the `testAgainstModel` flag.
`void`	`setTestAgainstModel(boolean testAgainstModel)` Set the value of the `testAgainstModel` flag.

Class GeneratorMain