fann_get_cascade_output_change_fraction

(PECL fann >= 1.0.0)

fann_get_cascade_output_change_fraction — Returns the cascade output change fraction

説明

function fann_get_cascade_output_change_fraction(resource $ann): float

The cascade output change fraction is a number between 0 and 1 determining how large a fraction of the fann_get_MSE() value should change within fann_get_cascade_output_stagnation_epochs() during training of the output connections, in order for the training not to stagnate. If the training stagnates, the training of the output connections will be ended and new candidates will be prepared.

It means that if the MSE does not change by a fraction of fann_get_cascade_output_change_fraction() during a period of fann_get_cascade_output_stagnation_epochs(), the training of the output connections is stopped because the training has stagnated.

If the cascade output change fraction is low, the output connections will be trained more and if the fraction is high, they will be trained less.

The default cascade output change fraction is 0.01, which is equivalent to a 1% change in MSE.

パラメータ

ann: ニューラルネットワークリソース。

戻り値

The cascade output change fraction, or false on error.

参考

fann_set_cascade_output_change_fraction() - Sets the cascade output change fraction
fann_get_MSE() - Reads the mean square error from the network
fann_get_cascade_output_stagnation_epochs() - Returns the number of cascade output stagnation epochs

関連キーワード:

output cascade change fraction fann training stagnation epochs connections candidates number during trained Fann resource float between determining large within order stagnate stagnates ended prepared