FunctionMinimum

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java.lang.Object
- org.freehep.math.minuit.FunctionMinimum

```
public class FunctionMinimum
extends Object
```
Result of the minimization.
The FunctionMinimum is the output of the minimizers and contains the minimization result. The methods
- userState(),
- userParameters() and
- userCovariance()
are provided. These can be used as new input to a new minimization after some manipulation. The parameters and/or the FunctionMinimum can be printed using the toString() method or the MnPrint class.
See Also:

userState(), userParameters(), userCovariance(), MnPrint

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`double`	`edm()` returns the expected vertical distance to the minimum (EDM)
`double`	`errorDef()`
`double`	`fval()` Returns the function value at the minimum.
`boolean`	`isValid()` In general, if this returns `true`, the minimizer did find a minimum without running into troubles.
`int`	`nfcn()` returns the total number of function calls during the minimization.
`String`	`toString()`
`MnUserCovariance`	`userCovariance()`
`MnUserParameters`	`userParameters()`
`MnUserParameterState`	`userState()` user representation of state at minimum

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - userState
```
public MnUserParameterState userState()
```
    user representation of state at minimum
  - userParameters
```
public MnUserParameters userParameters()
```
  - userCovariance
```
public MnUserCovariance userCovariance()
```
  - fval
```
public double fval()
```
    Returns the function value at the minimum.
  - edm
```
public double edm()
```
    returns the expected vertical distance to the minimum (EDM)
  - nfcn
```
public int nfcn()
```
    returns the total number of function calls during the minimization.
  - errorDef
```
public double errorDef()
```
  - isValid
```
public boolean isValid()
```
    In general, if this returns true, the minimizer did find a minimum without running into troubles. However, in some cases a minimum cannot be found, then the return value will be false. Reasons for the minimization to fail are
    - the number of allowed function calls has been exhausted
  - the minimizer could not improve the values of the parameters (and knowing that it has not converged yet)
- a problem with the calculation of the covariance matrix

Additional methods for the analysis of the state at the minimum are provided.

toString
```
public String toString()
```
Overrides:

toString in class Object

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Jas4pp 1.5 © Java Analysis Studio for Particle Physics