jhplot
Class F1D

java.lang.Object
  jhplot.DrawOptions
      jhplot.F1D

All Implemented Interfaces:

Serializable

public class F1D
extends DrawOptions
implements Serializable

Create a function in one dimension using "x" as a variable. The function name could have parameters named in unique way as P0, P1, P2 ... They have to be replaced with values using setPar() method for evaluation.

Author:

S.Chekanov

See Also:

Serialized Form

Constructor Summary

F1D(IFunction iname)
Create a F1D function from JAIDA IFunction.

F1D(IFunction iname, double min, double max)
Create a F1D function from JAIDA IFunction.

F1D(graph.ParseFunction function, double min, double max)
Build a function.

F1D(String name)
Create a function in 1D for evaluation.

F1D(String name, boolean parse)
Build a function

F1D(String title, double[] pars, double min, double max, boolean parse)
Create a polynomial analytical function using a list of values.

F1D(String name, double min, double max)
Create a function in 1D.

F1D(String name, double min, double max, boolean parsed)
Same function, but one can specify is it parsed or not.

F1D(String title, IFunction iname, double min, double max)
Create F1D function from JAIDA IFunction.

F1D(String title, graph.ParseFunction function, double min, double max)
Create a function in 1D.

F1D(String title, String name)
Create new function.

F1D(String title, String name, double min, double max)
Create a function in 1D.

F1D(String title, String name, double min, double max, boolean parse)
Create a new function.

Method Summary

double[]	differentiate(int N, double min, double max) Numerical differentiation.
void	doc() Show online documentation.
boolean	elementary() Convert this function rewrite in term of elementary functions (log, exp, frac, sqrt, implicit roots) This is useful before simplifying function.
void	eval() Evaluate a function for graphic representation.
double	eval(double x) Evaluate a function at a specific point in x
double[]	eval(double[] x) Evaluate a function for an array of x-values
void	eval(double min, double max) Evaluate a function for graphic representation.
void	eval(double min, double max, int Npoints) Evaluate a function for graphic representation.
boolean	expand() Convert this function rewrite in expanded form.
boolean	factorize() Convert this function rewrite in factorized form (if can).
double[]	getArrayX() Get array of X-values after function after evaluation using the default number of points
double[]	getArrayY() Get array of Y-values after function after evaluation using the default number of points
String	getException() If error occurs at some step, this is the way to retrieve it.
H1D	getH1D() Return H1D histogram from F1D function.
H1D	getH1D(String hname, int bins, double hmin, double hmax) Return a Histogram given by the F1D function.
IFunction	getIFunction() Get Jaida function
double	getMax() Get the maximum value in X
double	getMin() Get the minimum value in X
String	getName() Get the name of the function used for evaluation
graph.ParseFunction	getParse() Return parsed function.
int	getPoints() Get the number of points
String	getTitle() Get a function title
double	getX(int i) Get value in X-axis
double	getY(int i) Get value in Y-axis
double	integral(int N, double min, double max) Numerical integration using trapezium rule.
double	integral(String type, int N, double min, double max) Numerical integration.
boolean	isParsed() If the function is parsed correctly, return true.
boolean	numeric() Perform some numeric substitutions.
boolean	parse() Parse the function.
void	setMax(double max) Set the maximum value in X
void	setMin(double min) Set Min value in X
void	setName(String name) Sets a name of the function, i.e.
void	setPar(String parameter, double value) Replace abstract parameter with the value (double).
void	setPar(String parameter, int value) Replace abstract parameter with the value (integer).
void	setPoints(int bins) Sets the number points between Min and Max for evaluation
void	setTitle(String title) Sets a new title of a function
boolean	simplify() Try to simplify this function.
String	toJava() Convert the function into Java code.
String	toMathML() Convert the function into MathML form.
void	toTable() Print the F1D function to a Table in a separate Frame.
void	toTable(boolean format) Print the F1D function to a Table in a separate Frame.

Methods inherited from class jhplot.DrawOptions

copyLinePars, getBinWidth, getColor, getDrawOption, getDrawOptions, getLegend, getLineParm, getNameX, getNameY, getNameZ, getSymbol, getType, isBars, isErrX, isErrY, isFilled, printDrawOptions, printDrawOptions, setBars, setBinWidth, setColor, setDrawLine, setDrawLineKey, setDrawOption, setDrawSymbol, setErr, setErrAll, setErrColor, setErrColor, setErrColorX, setErrColorY, setErrFill, setErrFillColor, setErrFillColor, setErrSys, setErrSysFill, setErrSysFillColor, setErrSysFillColor, setErrSysX, setErrSysY, setErrTicSize, setErrX, setErrY, setFill, setFillColor, setFillColorTransparency, setGraphStyle, setLegend, setNameX, setNameY, setNameZ, setPenDash, setPenDash, setPenWidth, setPenWidthErr, setPenWidthErrSys, setStyle, setSymbol, setSymbolSize, setType

Methods inherited from class java.lang.Object

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

Constructor Detail

F1D

public F1D(String name,
           double min,
           double max)

Create a function in 1D. 500 points are used between Min and Max for evaluation. The title is set to the function's definition The function may have up to 3 independent variables in it (x,y,z).

Known Bugs This class is not fool proof. If the answer is wrong then use the parenthesis to force the order of evaluation. The most likely place this will be needed is in the use of the power command. The exponent is not evaluated correctly if it begins with a unary operator.

List of commands

• ( ) parenthesis , comma
• +, -, unary -, unary +
• , /
• ^ or ** (raise to a power)
• pi, e, All the constants in class SpecialFunction
• log
• sin, cos, tan, sinh, cosh, tanh
• asin, acos, atan
• sqrt
• rand
• exp
• remainder
• atan2(x,y) + special functions and constants. Read the book
• All the functions in class SpecialFunction
• Independent variables x
• Scientific notation using "e", "E", "d", "D".

Parameters:

name - String representing the function's definition

min - Min value

max - Max value

F1D

public F1D(String name,
           double min,
           double max,
           boolean parsed)

Same function, but one can specify is it parsed or not.

Parameters:

name - Name

min - Min value

max - Max value

parsed - parsed or not.

F1D

public F1D(String name)

Create a function in 1D for evaluation. The function may have one independent variable: x

If the answer is wrong then use the parenthesis to force the order of evaluation. The most likely place this will be needed is in the use of the power command. The exponent is not evaluated correctly if it begins with a unary operator.

List of commands

• ( ) parenthesis , comma
• +, -, unary -, unary +
• , /
• ^ or ** (raise to a power)
• pi, e, All the constants in class SpecialFunction
• log
• sin, cos, tan, sinh, cosh, tanh
• asin, acos, atan, asinh, acosh, atanh
• sqrt
• rand
• exp
• remainder
• atan2
• Special functions and constants. Look at the book
• All the functions in class SpecialFunction
• Independent variables x
• Scientific notation using "e", "E", "d", "D".

Parameters:

name - String representing the function

F1D

public F1D(String title,
           String name)

Create new function.

Parameters:

title - title

name - definition

F1D

public F1D(String title,
           String name,
           double min,
           double max,
           boolean parse)

Create a new function. The function may have up to 3 independent variables in it (x,y,z).

Known Bugs This class is not fool proof. If the answer is wrong then use the parenthesis to force the order of evaluation. The most likely place this will be needed is in the use of the power command. The exponent is not evaluated correctly if it begins with a unary operator.

List of commands

• ( ) parenthesis , comma
• +, -, unary -, unary +
• , /
• ^ or ** (raise to a power)
• pi, e, All the constants in class SpecialFunction
• log
• sin, cos, tan, sinh, cosh, tanh
• asin, acos, atan
• sqrt
• rand
• exp
• remainder
• atan2(x,y) + special functions and constants. Read the book
• All the functions in class SpecialFunction
• Independent variables x
• Scientific notation using "e", "E", "d", "D".

Parameters:

title - title

name - definition

min - min value

max - max value

parse - parset or not

F1D

public F1D(String title,
           double[] pars,
           double min,
           double max,
           boolean parse)

Create a polynomial analytical function using a list of values. Example: pars[0]+pars[1]*x+pars[2]*x*x +pars[3]*x*x*x

Parameters:

title - Title of this function

pars - array of coefficients for polynomial function

min - Min value for evaluation

max - Max value for evaluation

parse - set true if it should be parsed

F1D

public F1D(String name,
           boolean parse)

Build a function

Parameters:

name - name

parse - is parsed or not?

F1D

public F1D(String title,
           graph.ParseFunction function,
           double min,
           double max)

Create a function in 1D. 500 points are used between Min and Max for evaluation. The function may have up to 3 independent variables in it (x,y,z).

Known Bugs This class is not fool proof. If the answer is wrong then use the parenthesis to force the order of evaluation. The most likely place this will be needed is in the use of the power command. The exponent is not evaluated correctly if it begins with a unary operator.

List of commands

• ( ) parenthesis , comma
• +, -, unary -, unary +
• , /
• ^ (raise to a power)
• pi, e, All the constants in class SpecialFunction
• log
• sin, cos, tan, sinh, cosh, tanh
• asin, acos, atan
• sqrt
• rand
• exp
• remainder
• atan2(x,y) + special functions and constants. Read the book
• All the functions in class SpecialFunction
• Independent variables x
• Scientific notation using "e", "E", "d", "D".

Parameters:

title - Title

function - ParseFunction representing the function

min - Min value

max - Max value

F1D

public F1D(graph.ParseFunction function,
           double min,
           double max)

Build a function.

Parameters:

function - input

min - Min value

max - Max value

F1D

public F1D(String title,
           String name,
           double min,
           double max)

Create a function in 1D. 500 points are used between Min and Max for evaluation. Function will be parsed.

Parameters:

title - String representing the title

name - String representing the function's definition

min - Min value

max - Max value

F1D

public F1D(IFunction iname,
           double min,
           double max)

Create a F1D function from JAIDA IFunction. By default, 500 points for evaluation are used

Parameters:

iname - input IFunction

min - Min value

max - Max value

F1D

public F1D(IFunction iname)

Create a F1D function from JAIDA IFunction. By default, 500 points for evaluation are used

Parameters:

iname - input IFunction

F1D

public F1D(String title,
           IFunction iname,
           double min,
           double max)

Create F1D function from JAIDA IFunction. By default 500 points are used

Parameters:

title - Title

iname - input IFunction

min - Min X values

max - Max X values

Method Detail

parse

public boolean parse()

Parse the function.

Parameters:

true - if parsed OK

eval

public double eval(double x)

Evaluate a function at a specific point in x

Parameters:

x - value in x for evaluation

Returns:

function value at x

eval

public double[] eval(double[] x)

Evaluate a function for an array of x-values

Parameters:

x - array of values in x for evaluation

Returns:

array of function values

eval

public void eval(double min,
                 double max)

Evaluate a function for graphic representation. Number of points for evaluations is 500.

Parameters:

Min - value in x

Max - value in x

eval

public void eval(double min,
                 double max,
                 int Npoints)

Evaluate a function for graphic representation. Number of points for evaluations is 500.

Parameters:

Min - value in x

Max - value in x

Number - of evaluation points

eval

public void eval()

Evaluate a function for graphic representation. Min and Max should be given in constructor.

doc

public void doc()

Show online documentation.

toTable

public void toTable()

Print the F1D function to a Table in a separate Frame. The numbers are formatted to scientific format. One can sort and search the data in this table (data cannot be modified)

toTable

public void toTable(boolean format)

Print the F1D function to a Table in a separate Frame. The numbers are formatted to scientific format. One can sort and search the data in this table (but not modify)

Parameters:

format - if false, numbers will not be formatted to scientific format.

setPar

public void setPar(String parameter,
                   double value)

Replace abstract parameter with the value (double). Case sensitive!

Parameters:

parameter - parameter name

value - value to be inserted

getH1D

public H1D getH1D()

Return H1D histogram from F1D function. The number of points are given by setPoints() method, but the default 500 is used if not given. Min and Max values are given by the values used to parse the function.

Returns:

getH1D

public H1D getH1D(String hname,
                  int bins,
                  double hmin,
                  double hmax)

Return a Histogram given by the F1D function. All statistical characteristics of such histogram are meaningless. Bins and Min and Max values are user defined. The function is evaluated at the bin center which is important for small number of bins.

Parameters:

hname - Name of the histogram

bins - number of bins for histogram

hmin - min value of histogram

hmax - max value of histogram

Returns:

H1D histogram

setPar

public void setPar(String parameter,
                   int value)

Replace abstract parameter with the value (integer). Case sensitive.

Parameters:

parameter - parameter name

value - value to be inserted.

getX

public double getX(int i)

Get value in X-axis

Parameters:

i - index

Returns:

value in X

getY

public double getY(int i)

Get value in Y-axis

Parameters:

i - index

Returns:

value in Y

setTitle

public void setTitle(String title)

Sets a new title of a function

Overrides:

setTitle in class DrawOptions

Parameters:

title - Title of a function

getTitle

public String getTitle()

Get a function title

Overrides:

getTitle in class DrawOptions

Returns:

Title of a function

setName

public void setName(String name)

Sets a name of the function, i.e. what will be used for evaluation

Parameters:

name - Name

getName

public String getName()

Get the name of the function used for evaluation

Returns:

Name

getParse

public graph.ParseFunction getParse()

Return parsed function. One can evaluate Y as: y =function.getResult(x), where function is what returned by this method.

Returns:

function

setMin

public void setMin(double min)

Set Min value in X

Parameters:

min - Minimum value

getMin

public double getMin()

Get the minimum value in X

Returns:

min Minimum value

setMax

public void setMax(double max)

Set the maximum value in X

Parameters:

max - Maximal value

getMax

public double getMax()

Get the maximum value in X

Returns:

Maximal value

setPoints

public void setPoints(int bins)

Sets the number points between Min and Max for evaluation

Parameters:

bins - Number of points

integral

public double integral(String type,
                       int N,
                       double min,
                       double max)

Numerical integration. Define types as:
type="gauss4" - Gaussian integration formula (4 points)
type="gauss8" - Gaussian integration formula (8 points)
type="richardson" - Richardson extrapolation
type="simpson" - using Simpson's rule.
type="trapezium" - trapezium rule.

Parameters:

type - type of algorithm. Can be: "gauss4","gauss8","richardson","simpson","trapezium".

N - the number of strips to use for integration

min - the first ordinate.

max - the last ordinate.

Returns:

integral

integral

public double integral(int N,
                       double min,
                       double max)

Numerical integration using trapezium rule.

Parameters:

N - the number of strips to use for integration

min - the first ordinate.

max - the last ordinate.

Returns:

integral

getIFunction

public IFunction getIFunction()

Get Jaida function

Returns:

getArrayX

public double[] getArrayX()

Get array of X-values after function after evaluation using the default number of points

Returns:

X-values

getArrayY

public double[] getArrayY()

Get array of Y-values after function after evaluation using the default number of points

Returns:

Y-values

isParsed

public boolean isParsed()

If the function is parsed correctly, return true. Use this check before drawing it.

Returns:

true if parsed.

toMathML

public String toMathML()

Convert the function into MathML form.

Returns:

String representing this function in MathML.

toJava

public String toJava()

Convert the function into Java code.

Returns:

String representing this function in Java.

simplify

public boolean simplify()

Try to simplify this function. It is often useful to rewrite an expression in term of elementary functions (log, exp, frac, sqrt, implicit roots), using the "elementary()" before simplifying it. Retrieve the simplified name as a string using getName() method.

Returns:

false if error occurs. Retrieve this error as a string using getException().

elementary

public boolean elementary()

Convert this function rewrite in term of elementary functions (log, exp, frac, sqrt, implicit roots) This is useful before simplifying function. Retrieve the simplified name as a string using getName() method.

Returns:

false if error occurs. Retrieve this error as a string using getException().

expand

public boolean expand()

Convert this function rewrite in expanded form. Retrieve the expanded name as a string using getName() method.

Returns:

false if error occurs. Retrieve this error as a string using getException().

factorize

public boolean factorize()

Convert this function rewrite in factorized form (if can). Retrieve the expanded name as a string using getName() method.

Returns:

false if error occurs. Retrieve this error as a string using getException().

numeric

public boolean numeric()

Perform some numeric substitutions. Examples: exp(1) should be 2.71828182, "pi" should be 3.14159 etc. Retrieve the expanded name as a string using getName() method.

Returns:

false if error occurs. Retrieve this error as a string using getException().

differentiate

public double[] differentiate(int N,
                              double min,
                              double max)

Numerical differentiation.

Parameters:

N - the number of points to use.

min - the first ordinate.

max - the last ordinate.

Returns:

array with differentials

getPoints

public int getPoints()

Get the number of points

Returns:

Number of points

getException

public String getException()

If error occurs at some step, this is the way to retrieve it.

Returns:

last exception happened in any method of this class.