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LSEvaluationPoint Class

class localsolver.LSEvaluationPoint

An evaluation point associated with an external function with surrogate modeling.

Evaluation points are used to specify known points for a function in advance. It can be useful to warm-start the solver when the function is particularly expensive to evaluate, or if you already have a good estimate of the optimal point.

Note: This information is used by the solver to drive the solution process. You must be careful about the data you provide: if an incorrect value is given, the solver may have an unexpected behavior.

Since:10.0
See:LSSurrogateParameters.CreateEvaluationPoint
See:LSSurrogateParameters.GetEvaluationPoint

Summary

Methods
AddArgument Adds an integer argument with the given value.
SetArgument Sets the value of the argument at the given position.
SetReturnValue Sets the return value of this evaluation point.
IsIntReturnValue Returns true if the external function associated with this evaluation point is an integer function, false otherwise.
IsDoubleReturnValue Returns true if the external function associated with this evaluation point is a double function, false otherwise.
IsArrayReturnValue Returns true if the external function associated with this evaluation point is an array function, false otherwise.
IsIntArgument Returns true if the argument at this given position is an integer, false otherwise.
IsDoubleArgument Returns true if the argument at this given position is a double, false otherwise.
GetIntReturnValue Returns the return value of this evaluation point.
GetDoubleReturnValue Returns the return value of this evaluation point.
GetArrayReturnValue Returns the return value of this evaluation point.
GetIntArgument Returns the value of the argument at the given position.
GetDoubleArgument Returns the value of the argument at the given position.

Instance methods

void AddArgument(long value)

Adds an integer argument with the given value. Only allowed if the associated decision variable is an integer or a boolean. Only allowed in states Modeling or Stopped.

Arguments:value – Value of the argument.
void AddArgument(double value)

Adds a double argument with the given value. Only allowed if the associated decision variable is a double. Only allowed in states Modeling or Stopped.

Arguments:value – Value of the argument.
void SetArgument(int pos, long value)

Sets the value of the argument at the given position. Only allowed if this argument is an integer or a boolean. Only allowed in states Modeling or Stopped.

Arguments:
  • pos – Position in the argument list.
  • value – Value of the argument.
void SetArgument(int pos, double value)

Sets the value of the argument at the given position. Only allowed if this argument is a double. Only allowed in states Modeling or Stopped.

Arguments:
  • pos – Position in the argument list.
  • value – Value of the argument.
void SetReturnValue(long value)

Sets the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is an integer function. Only allowed in states Modeling or Stopped.

Arguments:value – Return value of this point.
void SetReturnValue(double value)

Sets the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is a double function. Only allowed in state Stopped.

Arguments:value – Return value of this point.
void SetReturnValue(long[] value)

Sets the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is an integer array function. Only allowed in states Modeling or Stopped.

Arguments:value – Return value of this point.
void SetReturnValue(double[] value)

Sets the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is a double array function. Only allowed in states Modeling or Stopped.

Arguments:value – Return value of this point.
bool IsIntReturnValue()

Returns true if the external function associated with this evaluation point is an integer function, false otherwise. You can retrieve the value with LSEvaluationPoint.GetIntReturnValue().

Returns:True if the return value is an integer.
Return type:bool
bool IsDoubleReturnValue()

Returns true if the external function associated with this evaluation point is a double function, false otherwise. You can retrieve the value with LSEvaluationPoint.GetDoubleReturnValue().

Returns:True if the return value is a double.
Return type:bool
bool IsArrayReturnValue()

Returns true if the external function associated with this evaluation point is an array function, false otherwise. You can retrieve the value with LSEvaluationPoint.GetArrayReturnValue().

Returns:True if the return value is an array.
Return type:bool
bool IsIntArgument(int pos)

Returns true if the argument at this given position is an integer, false otherwise. You can retrieve the value with LSEvaluationPoint.GetIntArgument(int pos).

Arguments:pos – Position in the argument list.
Returns:True if the argument at this given position is an integer.
Return type:bool
bool IsDoubleArgument(int pos)

Returns true if the argument at this given position is a double, false otherwise. You can retrieve the value with LSEvaluationPoint.GetDoubleArgument(int pos).

Arguments:pos – Position in the argument list.
Returns:True if the argument at this given position is a double.
Return type:bool
long GetIntReturnValue()

Returns the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is an integer function.

Returns:Return value of this point.
Return type:long
double GetDoubleReturnValue()

Returns the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is a double function.

Returns:Return value of this point.
Return type:double
LSArray GetArrayReturnValue()

Returns the return value of this evaluation point. Only allowed if the external function associated with this evaluation point is an array function.

Returns:Return value of this point.
Return type:LSArray
long GetIntArgument(int pos)

Returns the value of the argument at the given position. Only allowed if this argument is an integer or a boolean.

Arguments:pos – Position in the argument list.
Returns:Value of the argument.
Return type:long
double GetDoubleArgument(int pos)

Returns the value of the argument at the given position. Only allowed if this argument is a double.

Arguments:pos – Position in the argument list.
Returns:Value of the argument.
Return type:double