You can also download the class file of the crux part of this program from
here. But since this is a class file that it could be usuful only for Java
programmers. In addition, I don't have any responsibilities for the possible
bugs, sorry.You can play with the 100% pure Java
graf plot tool and caluculator on this page. The
graf plot tool enables you to plot a
graf in two different ways i.e. explicit
and parametric forms. In addition,
it has several options. For example,
translation and extention of coordinates,
change of scales of coordinates . Furthermore,in
case of parametric plot, you have the options
of changing a step of parameter and embedding the
value of parameter on the graf. The calculator
can read standard math functions such as
trigonometric functions, hyperbolic trigonometric
functions sqrt and so on. They are mostly
equal to Java standard functions. Calculator
may look easy to programm. However, it was
the crux part of this applet. Because, Java API 1.1 only have the method of
picking up the data on textfield as String
data.
You can also download the class file of the crux part of this program from
here. But since this is a class file that it could be usuful only for Java
programmers. In addition, I don't have any responsibilities for the possible
bugs, sorry.
1.basic operators
| Addition is [+], subtraction is[-], multiplication is [*], devide is [/],powers is [^]. |
Note; you can't omit '* .For example, "2x" is wrong, "2*x" is correct.
2.math constants
| Pai is [pi] , e( base of natural logarithm) is [e] |
Both must be typed in lower case. Also you can't substitute any numbers for them.(For example, "pi=3" is wrong, but "Pi=3" is O.K.)
3.functions; You need a pair of bracket to use a funtion. For
example, "sinx"is wrong, that should
be "sin(x)". Let me show you some
basic functions.
| trigonometric functions | sin(x),cos(x),tan(x) |
| exponential functions | exp(x)=ex,pow(a,x)=ax |
| logarithmic functions | log(x)(base is e),log(a,x)(base is a) |
| square root,powers | sqrt(x),a^x=ax |
| absolute value of x | abs(x)=|x| |
| 2*x+3 | 2x+3 |
| x^2 | x2 |
| (x-2)^2 | (x-2)2 |
| x^3+x^2 | x3+x2 |
| sin(x) | sin x |
| cos(2*x) | cos 2x |
| tan(x)/2 | tanx |
| exp(x) | ex |
| x*exp(x) | xex |
| log(x) | logx (base is e) |
| pow(2,x) | 2x |
| log(3,x) | logx (base is 3) |
| abs(x-2) | |x-2|(absolute value of x-2j |
| sqrt(x) | square root of x |
| random() | random function(interesting?) |
5.CalculaterGYou can use variables upto 10 with the calculater.
such as;
| expression; | 2*a+3 |
| variable & value; | a=3 |
You need a bracket when you use more than two variables.
| expression; | 2*x+3*y |
| variable & value; | (x,y)=(3,2) |
Of course, you don't have to use variables. And you can use standard functions.
| expression; | sin((2-(4-3))*pi) |
| variable & value; |
6.Help; To get more explanations, see the help file.
Back to Top page.
Ogose Shigeki
all rights reserved.