GraphApplet 1.05 |

Description |

The GraphApplet 1.05 is a full featured Graphing Calculator with some rare features added.

It is recommended that you use Netscape 4.x or higher or IE 4.x or higher
for this applet and

at least 800x600 resolution with more than 256 colors. Result in older
browsers and with different

resolution or color depth may vary, some problems have been noticed
in older browsers.

The GraphApplet has all the common operators and functions as expected
from any scientific

calculator and combines it with function graphing capabilities.

The GraphApplet supports juxtaposition which means you can write your
expressions just as you

would write them on a piece of paper, for example xcos(x) or 5x^3-6x

The GraphApplet has support for symbolic differentiation using the diff function.

To use the applet as a calculator click on the buttons or use the keyboard
to form your expression

and then press enter or click the **Eval** button to evaluate.

Note that when you click on a function button it will fill in a left
parenthesis, you will have to match it

with a right parenthesis either by clicking on the** ) **button
or enter it with the keyboard.

To draw a function enter the function by clicking on the buttons or
enter them with the keyboard

and then press the **PlotF **button, you can only draw function
of type y=f(x) .

To zoom into an area, select an area with the mouse ( click, hold down
and drag ) and release,

the area you selected will be zoomed in, to zoom out use the **ZOut
**button.

To reset the bounds to the original x:[-10,10] y:[-10,10] click on
the **Reset** button.

To clear the input field click the **Clear** button, to clear a individual
drawed function *double click* on the

function name in the list to the right of the applet or click on the
**Cls**
button to clear the whole screen.

To enter something into memory first click the **M-> **button and
click on either** m1** or **m2**,

to clear the memory first click on **MCls **and then either **m1**
or **m2**

All Functions |

__Calculator Controls__

**Eval **- Evaluates an expression, the calculator
first tries to evaluate the expression,

if it fails then it tries to draw the expression.

**Clear - **Clears the input area.

**PlotF - **Plots a function of type y=f(x)

**ZOut** - Zooms out the current area with a factor of
x2.

To Zoom into an area, select the area with the mouse and release.

**Reset - **Reset the bounds to the original x:[-10,10] y:[-10,10]

**Cls - **Clears the whole drawing
area and all functions.

To clear an individual function **double click** on the function in
the list to the right of the applet.

**M-> - **Enters an expression or a value into
memory, first click this button and then chose either **m1** or **m2**

**MCls - **Clears the memory, first click this button and then
on either **m1** or **m2** to clear that memory.

Note that memory will be gone if you leave the page with the applet and
then return at a later point.

**m1 - **Memory 1

**m2 - **Memory 2

__Operators and Functions__

**sqrt - **sqrt of a value or expression.

**sin - **sin of a value
or expression.

**cos -** cos of a value or expression.

**tan - **tan of a value or expression.

**atan - **atan of a value or expression.

**acos - **acos of a value or expression.

**asin - ** asin** **of a value or expression.

**acotan - **acotan of a value or expression.

**exp - **The constant
euler raised to a value or expression.

**ln - **The
natural logarithm.

**10log - **The 10 logarithm of a value or
expression.

**fac - **The faculty
of a value or expression.

**diff -** Symbolically
differentiates an expression of one variable

**pi - **The
constant PI

**euler** - The Euler constant, base
for the natural logarithm.

**+
- **Addition operator.

**-
- **Subtraction operator.

***
- **Multiplication operator.

**/
- **Division operator.

**^ - **Raised
to operator.

**The calculator also supports the following functions when entered
through the keyboard:**

sinh - Hyperbolic sine

cosh - Hyperbolic cosine

tanh - Hyperbolic tangens

abs - Absolute value of value or expression.

ceil
- Returns the smallest (closest to negative infinity)

value that is not less than the argument and is equal to

a mathematical integer.

floor - Returns
the largest (closest to positive infinity)

value that is not greater than the argument and is

equal to a mathematical integer.

sfac - Semifaculty of value or expression.

round - rounds the argument
to the closest mathematical integer.

Example: round( 3.4 ) = 3.0, round( 4.99 ) = 5.0 etc...

fpart - returns the decimalvalue of its argument

[base]log(..) - any logaritm. Example: 10log(10) = 1.0, exp(1)log(exp(1)) = 1.0

% - Modulo.

== - Equal, returns 1.0 if it's arguments are equal or 0.0 othervise.

!= - Not Equal, returns 1.0 if it's arguments are not equal or 0.0 othervise.

&& - And, returns 1.0 if both arguments evaluates to 1.0, or 0.0 othervise.

|| - Or, returns 1.0 if any of it's arguments evaluates to 1.0, or 0.0 othervise.

>
- Larger than, returns 1.0 if the value of the argument to the left is
larger

than the value of the argument to the right, or 0.0 othervise.

<
- Less than, returns 1.0 if the value of the argument to the left is less

than the value of the argument to the right, or 0.0 othervise.

>=
- Larger than or equal to, returns 1.0 if the value of the argument to
the left is larger

than or equal to the value of the argument to the right, or 0.0 othervise.

<=
- Less than or equal to, returns 1.0 if the value of the argument to the
left is less

than or equal to the value of the argument to the right, or 0.0 othervise.

!
- Not, returns 0.0 if it's argument evaluates to 1.0 and returns 1.0 if

it's argument evaluates to anything other than 1.0

Author **Patrik Lundin**, **patrik@lundin.info**,
**http://www.lundin.info**

Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Patrik Lundin