MeanVarianceCalculator should not perform range checks of the added values

[mkommend]

The OnlineMeanAndVarianceCalculator checks if the added values are in the range -1E13 - 1E13 and if this is not the case reports an error. This behavior is unique across all online calculators and should be removed.

The reason behind this is, that datasets containing such invalid values cannot be modeled with GP and Pearson's R² evaluator (e.g., most Korns datasets), because the algorithm executions are aborted due to invalid quality values.

[mkommend]

r11417: Unified behavior of online calculators by removing the range check from the OnlineMeanAndVarianceCalculator.

[mkommend]

After r11417 the symbolic regression sample unit test doesn't pass anymore, which means that this changeset breaks the reproducibility of algorithm results.

[mkommend]

Replying to mkommend:

After r11417 the symbolic regression sample unit test doesn't pass anymore, which means that this changeset breaks the reproducibility of algorithm results.

The reason is that before an individual is evaluated and checked if it produces invalid values the linear scaling and range limitation of values is performed. The linear scaling fails if an individual produces estimated values |value| > 1E13, because the linear scaling calculator reports the error invalid value added. Therefore, alpha and beta are reset to 0.0 and 1.0 (no change) and the estimated values are cut to the estimation limit boundaries. The quality calculation succeeds due to the range limitation, but results in a very low quality.

[mkommend]

r11422: Reverted r11417 due to broken unit tests.

[mkommend]

r14981: Recorded merge and reverse merge (11417,11422) in stable.

This ticket will not be implemented due to the reproducibility changes.