STK Components for .NET 2019 r1

## PartialDerivativesEvaluator Class |

An interface for an evaluator that takes a JulianDate, order, and list of
inputs and returns the partial derivatives of itself with respect to those inputs.

Inheritance Hierarchy

SystemObject

AGI.FoundationFunctionJulianDate, Matrix

AGI.FoundationMotionEvaluatorMatrix

AGI.Foundation.GeometryDynamicMatrixEvaluator

AGI.Foundation.NumericalMethods.AdvancedPartialDerivativesEvaluator

AGI.FoundationFunctionJulianDate, Matrix

AGI.FoundationMotionEvaluatorMatrix

AGI.Foundation.GeometryDynamicMatrixEvaluator

AGI.Foundation.NumericalMethods.AdvancedPartialDerivativesEvaluator

Syntax

The PartialDerivativesEvaluator type exposes the following members.

Constructors

Name | Description | |
---|---|---|

PartialDerivativesEvaluator(PartialDerivativesEvaluator, CopyContext) | Initializes a new instance as a copy of an existing instance. | |

PartialDerivativesEvaluator(EvaluatorGroup, IListIPartialDifferentiable, IPartialDifferentiable, IListIPartialDifferentiable) | Initializes a new instance that will evaluate the partial derivatives of the given partialsOfIPartialDifferentiable with respect to the given withRespectTo list of IPartialDifferentiable. The RowDimension of this instance will be equal to the Dimension of partialsOf. The ColumnDimension of this instance will be equal to the summation of the Dimensions of objects in the withRespectTo list. |

Properties

Name | Description | |
---|---|---|

AvailabilityIntervals |
Gets a TimeIntervalCollection over which data is available.
If the availability interval is infinite, this returns
Infinite.
(Inherited from MotionEvaluatorT.) | |

ColumnDimension |
Gets the ColumnDimension of the Matrix
object produced by the evaluation calls.
(Inherited from DynamicMatrixEvaluator.) | |

DependentVariable |
Gets the IPartialDifferentiable identifying the object that the partial derivatives calculated
during evaluation are of.
| |

Group |
Gets the group that contains this evaluator.
(Inherited from MotionEvaluatorT.) | |

IndependentVariables | Gets the list of IPartialDifferentiables identifying the objects that the partial derivatives calculated during evaluation are with respect to. As an optimization this is typically only the subset of the independentVariables provided to GetPartialDerivativesEvaluator(IListIPartialDifferentiable, EvaluatorGroup) for which the DependentVariable has non-zero partials, however a user-implemented PartialDerivativesEvaluator does not have to follow that pattern. This list of variables corresponds to the columns of the Matrix produced by Evaluate(JulianDate). Each IPartialDifferentiable in this list has a number of columns equal to its Dimension, and those column groupings follow the same order as this list. In addition, this list, while possible a subset of the independent variables specified by the user, will always be in the same order as that original list. | |

IsThreadSafe |
Gets a value indicating if the methods on this instance are safe to call from
multiple threads simultaneously.
(Inherited from FunctionTIndependent, TDependent.) | |

IsTimeVarying |
Gets a value indicating whether or not the value of this evaluator changes with time. If
, the evaluator is assumed to return the same value for any
input JulianDate.
(Inherited from MotionEvaluatorT.) | |

RowDimension |
Gets the RowDimension of the Matrix
object produced by the evaluation calls.
(Inherited from DynamicMatrixEvaluator.) |

Methods

Name | Description | |
---|---|---|

Clone |
Clones this object using the specified context.
(Inherited from FunctionTIndependent, TDependent.) | |

Dispose |
Releases any resources associated with this instance.
(Inherited from FunctionTIndependent, TDependent.) | |

Dispose(Boolean) |
Releases any resources associated with this instance.
(Inherited from FunctionTIndependent, TDependent.) | |

Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) | |

Evaluate(JulianDate) |
Calls EvaluatePartialsOfChildren(JulianDate) to calculate the partials derivatives of DependentVariable
with respect to all variables in IndependentVariables except for DependentVariable, and then adds
on the terms for the partial derivatives of DependentVariable with respect to itself, if necessary.
(Overrides MotionEvaluatorTEvaluate(JulianDate).) | |

Evaluate(JulianDate, Int32) | PartialDerivativeEvaluators only calculate zeroth order values,
this method returns a MotionT of order zero regardless of the requested order.
(Overrides MotionEvaluatorTEvaluate(JulianDate, Int32).) | |

Evaluate(TimeInterval, Duration, Int32) |
Evaluates this evaluator at a specified fixed step over the specified interval.
(Inherited from MotionEvaluatorT.) | |

Evaluate(JulianDate, JulianDate, Duration, Int32) |
Evaluates this evaluator at a specified fixed step over the specified interval.
(Inherited from MotionEvaluatorT.) | |

Evaluate(TimeInterval, Duration, Int32, ITrackCalculationProgress) |
Evaluates this evaluator at a specified fixed step over the specified interval.
(Inherited from MotionEvaluatorT.) | |

Evaluate(JulianDate, JulianDate, Duration, Int32, ITrackCalculationProgress) |
Evaluates this evaluator at a specified fixed step over the specified interval.
(Inherited from MotionEvaluatorT.) | |

EvaluateMotionWithoutOrder |
Evaluates the function using a default order.
(Inherited from MotionEvaluatorT.) | |

EvaluatePartialsOfChildren |
Evaluates the partials derivatives of DependentVariable
with respect to all variables in IndependentVariables except for DependentVariable,
as that is taken care of by Evaluate(JulianDate).
| |

Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) | |

GetAvailabilityIntervals |
Gets the intervals over which data is available. If the availability interval is
infinite, this returns Infinite.
(Inherited from MotionEvaluatorT.) | |

GetCachingWrapper |
Gets a version of this evaluator that caches the previously computed value so that if it is evaluated
twice at the same date the computation is done only once.
(Overrides DynamicMatrixEvaluatorGetCachingWrapper.) | |

GetHashCode | Serves as the default hash function. (Inherited from Object.) | |

GetNextSampleSuggestion |
Gets a suggestion for the next independent variable value at which to sample this function.
(Inherited from FunctionTIndependent, TDependent.) | |

GetType | Gets the Type of the current instance. (Inherited from Object.) | |

IsAvailable |
Returns if valid data is available for this Julian date, otherwise returns .
(Inherited from MotionEvaluatorT.) | |

MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) | |

ToString | Returns a string that represents the current object. (Inherited from Object.) | |

UpdateEvaluatorReferences |
Updates the evaluator references held by this object using the reference-to-reference
mapping in the specified CopyContext.
(Inherited from MotionEvaluatorT.) |

See Also