Class Chua

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

public class Chua

extends dynamicGraph

Version:

3 August, 1997

Author:

Michael Cross

a

parameter of equations R1/R

axisLabel

axis labels

b

parameter of equations (R2-R1)/R2

c

parameter of equations R1*R1*C1/L

delay

delay in graph update , and factor reducing time step

dt

time step (after reduction by delay)

dtp

input time step

err

error estimates from ode solver

errp

error estimates from ode solver

ncurve

number of curves

ncurve1

index of data curve

ntrans

number of iterations to eliminate transient = trans/dt

numSliders

number of parameters set by sliders

nVariables

number of variables (icluding time)

params

inital values of R,R1,R2,C1,C2,L,r

plot_x

variable to be plotted on x-axis

plot_y

variable to be plotted on x-axis

r

parameter of equations C1/C2

rl

parameter of equations r/R1

runTrans

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

showTime

true if time to be shown.

status

GUI item

t

evolving time

trans

transient time

transientColor

Color of ghost

x

evolving variables

x0

starting values of x

Chua(startChua)

derivs(double[], double, int)

Returns RHS of differential equations for Chua model

disableAll()

Disables text input in variables

enableAll()

Enables text input in variables

handleEvent(Event)

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

insets()

iterate()

Iterates Chua equations and updates graph

movieStart()

Start movie thread

movieStop()

Stop movie thread

respondToButtons(int)

Respond to buttonControls

respondToChoices()

Responds to choiceControls

respondToSliderButtons()

Responds to buttons in sliderControls

respondToSliderText()

Responds to text boxes in sliderControls

respondToText()

Responds to textControls

restart()

Resets plot by deleting all curves and restarting

stop()

Stop thread

updateParameters()

Updates parameters from the sliderControls

updateSpeed(int)

updateVariables()

Update parameters form the textControls

 int ncurve

number of curves

 int ncurve1

index of data curve

 int plot_x

variable to be plotted on x-axis

 int plot_y

variable to be plotted on x-axis

 int delay

delay in graph update , and factor reducing time step

 double trans

transient time

 int ntrans

number of iterations to eliminate transient = trans/dt

 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

 double t

evolving time

 double dt

time step (after reduction by delay)

 double dtp

input time step

 double x[]

evolving variables

 double a

parameter of equations R1/R

 double b

parameter of equations (R2-R1)/R2

 double c

parameter of equations R1*R1*C1/L

 double r

parameter of equations C1/C2

 double rl

parameter of equations r/R1

 double params[]

inital values of R,R1,R2,C1,C2,L,r

 double x0[]

starting values of x

 double err

error estimates from ode solver

 double errp

error estimates from ode solver

 String axisLabel[]

axis labels

 Color transientColor

Color of ghost

 int numSliders

number of parameters set by sliders

 Label status

GUI item

 public Chua(startChua target)

Parameters:

target - starting class

See Also:

startChua

 public void respondToText()

Responds to textControls

Overrides:

respondToText in class dynamicGraph

See Also:

textControls

 public void respondToSliderButtons()

Responds to buttons in sliderControls

Overrides:

respondToSliderButtons in class dynamicGraph

See Also:

sliderControls

 public void respondToSliderText()

Responds to text boxes in sliderControls

Overrides:

respondToSliderText in class dynamicGraph

See Also:

sliderControls

 public Insets insets()

Overrides:

insets in class Container

 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 in variables

 public void enableAll()

Enables text input in variables

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

Returns RHS of differential equations for Chua 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 sliderControls

 public void updateVariables()

Update parameters form the textControls

 public void restart()

Resets plot by deleting all curves and restarting

 public boolean iterate()

Iterates Chua equations and updates graph

Overrides:

iterate in class dynamicGraph

 public void stop()

Stop thread

 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 updateSpeed(int in_delay)

Overrides:

updateSpeed in class dynamicGraph