vec_math
Class ExpressionFit

java.lang.Object
  util.PropertyContainer
      util.PropertyResources
          util.PropertyBundles
              vec_math.AbstractFit
                  vec_math.ExpressionFit

All Implemented Interfaces:

Cloneable, Initializable, LocalizedSupplying, PropertySupplying, ResourceSupplying, ModelFitting

public class ExpressionFit
extends AbstractFit

Analyses a funtion by fitting a non-linear model to it.

Nested Class Summary

protected static class

ExpressionFit.AmoebaModel A multidimensional that evaluates a function f given as a string like

Nested classes/interfaces inherited from class util.PropertyResources

PropertyResources.URLResource

Field Summary

private Amoeba	crawl The Amoeba used for solving.
private List<Variable>	fitted After fitting, the parameters.
private ExpressionFit.AmoebaModel	model My multidimensional used for solving the crawl.

Fields inherited from class vec_math.AbstractFit

KEY_DEFAULTERROR, KEY_DEFAULTFORMAT, KEY_ERRORFORMAT, KEY_PARAMETERFORMAT

Fields inherited from class util.PropertyBundles

KEY_LOCALECOUNTRY, KEY_LOCALELANGUAGE, KEY_RESOURCEBUNDLES

Fields inherited from class util.PropertyResources

KEY_NOINITONCREATE, localurl, locate, POSTFIX_DIR, POSTFIX_EXT, POSTFIX_FILE, POSTFIX_LIST, POSTFIX_URL, urlset

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface util.ResourceSupplying

KEY_URLRESOURCES, KEY_URLUSECONFIG, KEY_URLUSECURRENT, KEY_URLUSEHOME

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Constructor Summary

ExpressionFit(Map<String,String> prop)

Method Summary

void	estimateStart(VectorG start, double ls) Estimates the start for the amoeba.
void	estimateStart(VectorG start, VectorG ls) Estimates the start for the amoeba.
List<Variable>	fit() Tries to fit the measures to the underlying data model.
DataModel	getDataModel() Returns the data model.
List<Variable>	getFittedParameters() Fitted parameters.
DataModel	prepareFit(VectorG[] data) The data is processed by slowly fitting the amoeba to a minimum.
double	qualityOfFit() The simplex approximation is a chi^2, from that we get RMS.
void	setExpression(String node) Sets the string expression that is used to evaluate the data model.
void	setFitIndex(int i) Sets the data index in the amoeba model.

Methods inherited from class vec_math.AbstractFit

formatError, formatValue, getChi2, getModelParameterErrors, getModelParameterValues, getR2, getRms, init, setConstant, setInitialCondition

Methods inherited from class util.PropertyBundles

clone, getLocalized, getLocalized, getLocalizedString, getLocalizedString, loadResource

Methods inherited from class util.PropertyResources

createFrom, createFrom, createFrom, getApplet, getAsResources, getLocalClassLoader, getPropertiesToKey, getPropertiesToKey, getResource, getResourceAsStream, getResourceFromKey, getResources, keyCreate, keyCreate, reload, setApplet

Methods inherited from class util.PropertyContainer

augment, augment, augment, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, isNew, parseObject, reload, removeProperty, rescanned, setObject, setProperties, setProperty, stringProperties, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface util.ResourceSupplying

getResource, getResourceAsStream, getResources

Methods inherited from interface util.PropertySupplying

defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, parseObject, removeProperty, setObject, setProperty, stringProperties

Field Detail

crawl

private Amoeba crawl

The Amoeba used for solving.

model

private ExpressionFit.AmoebaModel model

My multidimensional used for solving the crawl.

fitted

private List<Variable> fitted

After fitting, the parameters.

Constructor Detail

ExpressionFit

public ExpressionFit(Map<String,String> prop)

Method Detail

setExpression

public void setExpression(String node)
                   throws ParseException

Sets the string expression that is used to evaluate the data model. From here, some methods in the model are already accessible.

Throws:

ParseException

setFitIndex

public void setFitIndex(int i)

Sets the data index in the amoeba model.

prepareFit

public DataModel prepareFit(VectorG[] data)

The data is processed by slowly fitting the amoeba to a minimum.

Parameters:

data - An array of measurements. Each vector contains dependant and independant variables and eventually their errors.

Returns:

A Vector3D array of data.0, data.yindex, fit

fit

public List<Variable> fit()

Description copied from interface: ModelFitting

Tries to fit the measures to the underlying data model. The fitter must have been prepared with ModelFitting.prepareFit(vec_math.VectorG[]). The solution returned is also retrievable later via ModelFitting.getFittedParameters()

Returns:

Non-null, if a fit could be obtained.

getDataModel

public DataModel getDataModel()

Returns the data model.

qualityOfFit

public double qualityOfFit()

The simplex approximation is a chi^2, from that we get RMS.

Specified by:

qualityOfFit in interface ModelFitting

Overrides:

qualityOfFit in class AbstractFit

getFittedParameters

public List<Variable> getFittedParameters()

Fitted parameters.

estimateStart

public void estimateStart(VectorG start,
                          double ls)

Estimates the start for the amoeba.

estimateStart

public void estimateStart(VectorG start,
                          VectorG ls)

Estimates the start for the amoeba.