org.tensorics.incubate.function

Class Functions

java.lang.Object

org.tensorics.incubate.function.Functions

public final class Functions
extends java.lang.Object

Provides utility methods which deal with functions.

Method Summary

Modifier and Type	Method and Description
static DiscreteFunction<java.lang.Double,java.lang.Double>	convertToDiscreteFunctionFrom(double[] times, double[] values)
static DiscreteFunction<java.lang.Double,java.lang.Double>	convertToDiscreteFunctionFrom(double[] times, double[] values, double[] errors)
static DiscreteFunction<java.lang.Double,java.lang.Double>	convertToDiscreteFunctionFrom(java.util.Map<java.lang.Double,java.lang.Double> map, java.lang.String name)
static DiscreteFunction<java.lang.Double,java.lang.Double>	createInterpolatedFunctionFromTwoPoints(double startPoint, double endPoint, double length)
static DiscreteFunction<java.lang.Double,java.lang.Double>	cutBeginingOfExp(DiscreteFunction<java.lang.Double,java.lang.Double> function, double yLimit) Allows to get cut first part of ig exp decay if above limit.
static DiscreteFunction<java.lang.Double,java.lang.Double>	emptyDiscreteFunction()
static java.util.List<java.lang.Double>	getXsIntersection(DiscreteFunction<java.lang.Double,?> first, DiscreteFunction<java.lang.Double,?> second)
static double	integrate(DiscreteFunction<java.lang.Double,java.lang.Double> function) Performs numerical integral of given function within full range of given function.
static double	integrate(DiscreteFunction<java.lang.Double,java.lang.Double> function, double start, double end) performs numerical integral of given function within start and end values.
static DiscreteFunction<java.lang.Double,java.lang.Double>	scaleFunction(DiscreteFunction<java.lang.Double,java.lang.Double> function, double scale) Multiplies the Y values of the given function with the value scale.

Methods inherited from class java.lang.Object

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

Method Detail

convertToDiscreteFunctionFrom

public static DiscreteFunction<java.lang.Double,java.lang.Double> convertToDiscreteFunctionFrom(double[] times,
                                                                                                double[] values)

getXsIntersection

public static java.util.List<java.lang.Double> getXsIntersection(DiscreteFunction<java.lang.Double,?> first,
                                                                 DiscreteFunction<java.lang.Double,?> second)

convertToDiscreteFunctionFrom

public static DiscreteFunction<java.lang.Double,java.lang.Double> convertToDiscreteFunctionFrom(double[] times,
                                                                                                double[] values,
                                                                                                double[] errors)

convertToDiscreteFunctionFrom

public static DiscreteFunction<java.lang.Double,java.lang.Double> convertToDiscreteFunctionFrom(java.util.Map<java.lang.Double,java.lang.Double> map,
                                                                                                java.lang.String name)

emptyDiscreteFunction

public static DiscreteFunction<java.lang.Double,java.lang.Double> emptyDiscreteFunction()

createInterpolatedFunctionFromTwoPoints

public static DiscreteFunction<java.lang.Double,java.lang.Double> createInterpolatedFunctionFromTwoPoints(double startPoint,
                                                                                                          double endPoint,
                                                                                                          double length)

scaleFunction

public static DiscreteFunction<java.lang.Double,java.lang.Double> scaleFunction(DiscreteFunction<java.lang.Double,java.lang.Double> function,
                                                                                double scale)

Multiplies the Y values of the given function with the value scale.

Parameters:

function - the function to scale

scale - the factor, by which to multiply the function Y values

Returns:

the scaled function

integrate

public static double integrate(DiscreteFunction<java.lang.Double,java.lang.Double> function)

Performs numerical integral of given function within full range of given function. Simplest method of sum of dt*Y.

Parameters:

function - the function to treat

Returns:

the value of the numerical integral

integrate

public static double integrate(DiscreteFunction<java.lang.Double,java.lang.Double> function,
                               double start,
                               double end)

performs numerical integral of given function within start and end values. Simplest method of sum of dt*Y.

Parameters:

function - the function to integrate

start - the lower border of the integration

end - the upper border of the integration

Returns:

the value calculated from the integration

cutBeginingOfExp

public static DiscreteFunction<java.lang.Double,java.lang.Double> cutBeginingOfExp(DiscreteFunction<java.lang.Double,java.lang.Double> function,
                                                                                   double yLimit)

Allows to get cut first part of ig exp decay if above limit.

Parameters:

function - function to treat

yLimit - UPPER limit, above which original values are omitted

Returns:

the cut function