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java.lang.Objectnr.minimizer.VecMinimizerImp
public abstract class VecMinimizerImp
Simple implementation of a VecMinimizer
. The constructor takes a
#nr.ScalarFunction
and epsilon is used to create a vector, such that
if the trial minimum is changed less than that vector in each component, the
algorithm has converged.
The concrete implementation needs to implement doMinimize
.
Field Summary | |
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int |
MAXFUNCTIONEVAL
The maximum number of times to evaluate the function before throwing #nr.DidNotConvergeException |
Constructor Summary | |
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VecMinimizerImp(ScalarFunction f)
create a new instance of VecMinimizerImp. |
Method Summary | |
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double |
getEpsilon()
return the relative accuracy parameter |
double |
minimize(Vec x)
minimize. |
int |
numFuncEvals()
the number of function evaluations it took to converge to the minimum. |
void |
setEpsilon(double epsilon)
set the desired relative accuracy parameter. |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public final int MAXFUNCTIONEVAL
#nr.DidNotConvergeException
Constructor Detail |
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public VecMinimizerImp(ScalarFunction f)
f
- the ScalarFunction
to minimizeMethod Detail |
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public double minimize(Vec x)
minimize
in interface VecMinimizer
x
- the initial guess; epsilon*x is the convergence criterion.
x will be changed to the minimum of the initial function.
DidNotConvergeException
- if the algorithm could not find the minimumpublic double getEpsilon()
VecMinimizer
getEpsilon
in interface VecMinimizer
public void setEpsilon(double epsilon)
VecMinimizer
setEpsilon
in interface VecMinimizer
public int numFuncEvals()
VecMinimizer
numFuncEvals
in interface VecMinimizer
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