| Name | Description | Type | Package | Framework |
| ATanErrorFunction | An ATan based error function. | Class | org.encog.neural.error | HeatonReasearch |
| ErrorFunction | An error function. | Interface | org.encog.neural.error | HeatonReasearch |
| LinearErrorFunction | The standard linear error function, simply returns the difference between the actual and ideal. | Class | org.encog.neural.error | HeatonReasearch |
| OutputErrorFunction | Class | org.encog.neural.error | HeatonReasearch | |