Class Lorenz

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Window
                           |
                           +----java.awt.Frame
                                   |
                                   +----ChaosDemos.dynamicGraph
                                           |
                                           +----Lorenz

public class Lorenz

extends dynamicGraph

Version:

3 August, 1997

Author:

Michael Cross

a

parameter of equations

axisLabel

axis labels

b

parameter of equations

c

parameter of equations

curve2

true if second trace to be plotted

delay

delay in graph update , and factor reducing time step

dt

time step (after reduction by delay)

dtp

input time step

dx

perturbation for second trace

err

error estimates from ode solver

errp

error estimates from ode solver

ncurve

number of curves

ncurve1

index of first data curve

ncurve2

index of second data curve

ntrans

number of iterations to eliminate transient = trans/dt

nVariables

number of variables (icluding time)

plot_x

variable to be plotted on x-axis

plot_y

variable to be plotted on y-axis

runTrans

true if transient is to be run on call to restart()

showTime

true if time to be shown.

t

evolving time

trans

transient time

transientColor

Color of ghost

x

evolving variables

x0

starting values of x

Lorenz(startLor)

derivs(double[], double, int)

Returns RHS of differential equations for Lorenz model

disableAll()

Disables text input and choice controls

enableAll()

Enables text input and choice contorls

handleEvent(Event)

Event handler: Stops iteration on minimising and handles close window event
(May fail under Windows95)

iterate()

Iterates Lorenz equations and updates graph

movieStart()

Start movie thread

movieStop()

Stop movie thread

respondToButtons(int)

Respond to buttonControls

respondToChoices()

Responds to choiceControls

respondToText()

Responds to textControls

restart()

Resets plot by deleting all curves and restarting

stop()

Stop movie thread

updateParameters()

Updates parameters from the text controls

updateSpeed(int)

 int ncurve

number of curves

 int ncurve1

index of first data curve

 int ncurve2

index of second data curve

 int plot_x

variable to be plotted on x-axis

 int plot_y

variable to be plotted on y-axis

 int delay

delay in graph update , and factor reducing time step

 int ntrans

number of iterations to eliminate transient = trans/dt

 double trans

transient time

 int nVariables

number of variables (icluding time)

 boolean runTrans

true if transient is to be run on call to restart()

 boolean showTime

true if time to be shown. Set by choices

 boolean curve2

true if second trace to be plotted

 double dt

time step (after reduction by delay)

 double dtp

input time step

 double t

evolving time

 double x[]

evolving variables

 double x0[]

starting values of x

 double dx[]

perturbation for second trace

 double a

parameter of equations

 double b

parameter of equations

 double c

parameter of equations

 double err

error estimates from ode solver

 double errp

error estimates from ode solver

 Color transientColor

Color of ghost

 String axisLabel[]

axis labels

 Lorenz(startLor target)

Parameters:

target - starting class

See Also:

startLor

 public void respondToText()

Responds to textControls

Overrides:

respondToText in class dynamicGraph

See Also:

textControls

 public void respondToChoices()

Responds to choiceControls

Overrides:

respondToChoices in class dynamicGraph

See Also:

choiceControls

 public void respondToButtons(int buttonIndex)

Respond to buttonControls

Parameters:

buttonIndex - index of button pushed

Overrides:

respondToButtons in class dynamicGraph

See Also:

buttonControls

 public void movieStop()

Stop movie thread

 public void movieStart()

Start movie thread

 public boolean handleEvent(Event evt)

Event handler: Stops iteration on minimising and handles close window event
(May fail under Windows95)

Overrides:

handleEvent in class Component

 public void disableAll()

Disables text input and choice controls

 public void enableAll()

Enables text input and choice contorls

 public double[] derivs(double x[],
                        double t,
                        int n)

Returns RHS of differential equations for Lorenz model

Parameters:

x[] - vector of current value of dependent variables

n - number of dependent variables in array x[]

t - current value of independent variable

Returns:

n compoent vector giving derivatives of dependent variables

Overrides:

derivs in class dynamicGraph

 public void updateParameters()

Updates parameters from the text controls

 public boolean restart()

Resets plot by deleting all curves and restarting

 public boolean iterate()

Iterates Lorenz equations and updates graph

Overrides:

iterate in class dynamicGraph

 public void stop()

Stop movie thread

 public void updateSpeed(int in_delay)

Overrides:

updateSpeed in class dynamicGraph