GraphMe Functions Display Help
3D
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f(x) =

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Options About

### Widget options

Widget theme :

# Preferences saved :

Options About

### Widget developed by

Yannick Vessaz
yannick.vessaz@gmail.com
https://yannick.vessaz.net/GraphMe

If you want to report a bug, make a proposal or just ask questions about this widget, you can contact me at the following e-mail : yannick.vessaz@gmail.com.
Background images come from the KDE desktop environment.
version 2.1.0 (2018-06-04) (changelog)
Changelog
Display parameters Functions parameters

#### Plot range

X-axis:
to
Y-axis:
to
Zoom:
Default zoom :

#### Options

Display method :
Show grid
Show axis
Show scale
Graph accuracy, computed points :
+
-
Improve accuracy on zoom (can be slower).

Display parameters Functions parameters

### Default functions parameters

Thickness :
+
-
Draw derivatives and primitives :
f'(x) f''(x) F(x)
Draw area under function
Line style :
3D Display
Display style :
Graph accuracy :
+
-
Colors configuration
use red for:
use green for:
use blue for:
General value : (between 0 and 255)
Usage Exemples

# How it works

This widget allow to draw mathematical function. Enter function in the field in the top part of widget and press "Show". Open the "Fonctions" menu to modify the current function or add a new function.

You can enter following mathematical functions :

## Basic operations

- Plus -> +
- Minus -> -
- Multiplication -> *
- Division -> /
- Modulus -> %

## Trigonometric functions

- Sine -> sin(x)
- Cosine -> cos(x)
- Tangent -> tan(x)
- Cotangent -> cot(x)
- Secant -> sec(x)
- Cosecant -> csc(x)

- Arc sine -> arcsin(x) or asin(x)
- Arc cosine -> arccos(x) or acos(x)
- Arc tangent -> arctan(x) or atan(x)
- Arc cotangent -> arccot(x) or acot(x)

## Hyperbolic functions

- Hyperbolic sine -> sinh(x)
- Hyperbolic cosine -> cosh(x)
- Hyperbolic tangent -> tanh(x)
- Hyperbolic cotangent -> coth(x)
- Hyperbolic secant -> sech(x)
- Hyperbolic cosecant -> csch(x)

- Hyperbolic arc sine -> arcsinh(x) or asinh(x)
- Hyperbolic arc cosine -> arccosh(x) or acosh(x)
- Hyperbolic arc tangent -> arctanh(x) or atanh(x)
- Hyperbolic arc cotangent -> arccoth(x) or acoth(x)

## Power and root

- Square root -> sqrt(x)
- Power -> pow(x, y) Élève x à la puissance y
- Root -> root(x, y) Root y de x

## Exponential and logarithm

- ex -> exp(x)
- Natural logarithm -> ln(x)
- Decimal logarithm -> log(x)

## Absolute value

- |x| -> abs(x)

## Rounding

- round(x) -> round to the nearest integer
- ceil(x) -> round to the first integer bigger than x
- floor(x) -> round to the first integer lower than x

# Constants

Some constants are also available :

- pi = 4 * atan(1) ≈ 3,141592653589793
- e = exp(1) ≈ 2.718281828459045

# Keyboard shortcuts

ctrl + left arrow -> graph will be moved left
ctrl + top arrow -> graph will be moved top
ctrl + right arrow -> graph will be moved right
ctrl + bottom arrow -> graph will be moved bottom

Usage Exemples
(You can click on an example to view it. Do not forget to set accuracy in options if necessary.)

# 2D Fonctions

f(x) = 0.5*x+1
f(x) = pow(x,2)-3
f(x) = 1/x
f(x) = atan(x)
f(x) = (x+1/x)/1.2
f(x) = sin(10*x*x)*0.5
f(x) = log(pow(x-2,2))
f(x) = (x*x-5*x+5)*exp(x)/5
f(x) = random()

# 3D Fonctions

f(x,y) = sin(x)+cos(y)
f(x,y) = sqrt(10-x*x)
f(x,y) = atan(x)+atan(y)

Function study

f(x) = ...

Domain of definition : ...

Symmetry : ...

Zeros : ...

Sign :

Asymptotes :
...

Extremums :
...

Inflexion points :
...

The tool for function analysis is not 100% reliable. Don't forget to check the results before any usage.
Functions History
Edit Tools
f(x) =
x(t) =
y(t) =
"t" from to
Thickness : Color :
Derivatives : f'(x) f''(x)
Primitive : F(x) F(0) =
Style :
Area under function :
Edit Tools
Compute a point on the fonction :
x=
Compute area under the function :
De à
Function study :
New function :
f(x) = r(t) = x(t) =
y(t) =
Functions list :
f(x,y) =
Functions History

### Latest displayed functions

Color picker

Color : |
Value : |
Saturation : |
Red : |
Green : |
Blue : |
Opacity : |

Save image

You can right click on the image and select "Save image". It is also possible to choose "Copy image" and past it into another application.

# ------- Error -------

Cannot draw function ...
Invalid character or expression :

#### ------- Error -------

Check the function and try to draw it again.
Error message : .
You can find examples of various drawable functions in the help menu.

# Save graph

Width :
Height :
Background color :
Image format :
Updates
Current version :
Latest version available online :

# ------- Error -------

Update to latest version is not available because you already use the latest version.

# Preferences saved!

# Automatic update

Do you really want to use the latest online widget version ?
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# Display

Axes
Scale
Grid
x