org.freehep.math.minuit

Class MnUserParameters

java.lang.Object

org.freehep.math.minuit.MnUserParameters

public class MnUserParameters
extends Object

API class for the user interaction with the parameters. Serves as input to the minimizer as well as output from it; users can interact: fix/release parameters, set values and errors, etc.; parameters can be accessed via their parameter number or via their user-specified name.

Constructor Summary

Constructors

Constructor and Description
MnUserParameters() Creates a new instance of MnUserParameters
MnUserParameters(double[] par, double[] err)

Method Summary

Modifier and Type	Method and Description
void	add(String name, double val) Add const parameter name, value
void	add(String name, double val, double err) Add free parameter name, value, error
void	add(String name, double val, double err, double low, double up) Add limited parameter name, value, lower bound, upper bound
double	error(int index)
double	error(String name)
void	fix(int index) Fixes the specified parameter (so that the minimizer will no longer vary it)
void	fix(String name) Fixes the specified parameter (so that the minimizer will no longer vary it)
MnMachinePrecision	precision()
void	release(int index) Releases the specified parameter (so that the minimizer can vary it)
void	release(String name) Releases the specified parameter (so that the minimizer can vary it)
void	removeLimits(int index)
void	removeLimits(String name)
void	setError(int index, double err)
void	setError(String name, double err)
void	setLimits(int index, double low, double up) Set the lower and upper bound on the specified variable.
void	setLimits(String name, double low, double up) Set the lower and upper bound on the specified variable.
void	setLowerLimit(int index, double low)
void	setLowerLimit(String name, double low)
void	setPrecision(double eps)
void	setUpperLimit(int index, double up)
void	setUpperLimit(String name, double up)
void	setValue(int index, double val) Set the value of parameter.
void	setValue(String name, double val) Set the value of parameter.
String	toString()
double	value(int index)
double	value(String name)
int	variableParameters()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MnUserParameters

public MnUserParameters()

Creates a new instance of MnUserParameters

MnUserParameters

public MnUserParameters(double[] par,
                        double[] err)

Method Detail

variableParameters

public int variableParameters()

add

public void add(String name,
                double val,
                double err)

Add free parameter name, value, error

When adding parameters, MINUIT assigns indices to each parameter which will be the same as in the double[] in the FCNBase.valueOf(). That means the first parameter the user adds gets index 0, the second index 1, and so on. When calculating the function value inside FCN, MINUIT will call FCNBase.valueOf() with the elements at their respective positions.

add

public void add(String name,
                double val,
                double err,
                double low,
                double up)

Add limited parameter name, value, lower bound, upper bound

add

public void add(String name,
                double val)

Add const parameter name, value

fix

public void fix(int index)

Fixes the specified parameter (so that the minimizer will no longer vary it)

release

public void release(int index)

Releases the specified parameter (so that the minimizer can vary it)

setValue

public void setValue(int index,
                     double val)

Set the value of parameter. The parameter in question may be variable, fixed, or constant, but must be defined.

setError

public void setError(int index,
                     double err)

setLimits

public void setLimits(int index,
                      double low,
                      double up)

Set the lower and upper bound on the specified variable.

setUpperLimit

public void setUpperLimit(int index,
                          double up)

setLowerLimit

public void setLowerLimit(int index,
                          double low)

removeLimits

public void removeLimits(int index)

value

public double value(int index)

error

public double error(int index)

fix

public void fix(String name)

Fixes the specified parameter (so that the minimizer will no longer vary it)

release

public void release(String name)

Releases the specified parameter (so that the minimizer can vary it)

setValue

public void setValue(String name,
                     double val)

Set the value of parameter. The parameter in question may be variable, fixed, or constant, but must be defined.

setError

public void setError(String name,
                     double err)

setLimits

public void setLimits(String name,
                      double low,
                      double up)

Set the lower and upper bound on the specified variable.

setUpperLimit

public void setUpperLimit(String name,
                          double up)

setLowerLimit

public void setLowerLimit(String name,
                          double low)

removeLimits

public void removeLimits(String name)

value

public double value(String name)

error

public double error(String name)

precision

public MnMachinePrecision precision()

setPrecision

public void setPrecision(double eps)

toString

public String toString()

Overrides:

toString in class Object