Function Grapher and Calculator

New Version! :: Description :: All Functions

Description

Function Grapher is a full featured Graphing Utility that supports graphing two functions together.

It has the unique feature that you can save your work as a URL (website link).

Usage

To plot a function just type it into the function box. Use "x" as the variable.

Examples:

  • sin(x)
  • 2x-3
  • cos(x^2)
  • (x-3)(x+3)

 

Zooming and Re-centering

To zoom into an area, select an area with the mouse (click, hold down and drag, then release). The area you selected will be the new bounds. This may result in the x and y scales being different if "Equal Scales" is not on.

If you just click-and-release (without creating a rectangle), then the spot you clicked will be the new center.

You can zoom in or out out using the Zoom Slider. The slider resets to the middle when you release it so you can zoom again and again. You can also use the Out 10x button.

To reset the zoom to the original bounds click on the Reset button.

After clicking on the graph you can use the arrow keys (up, down, left and right) to move the graph around.

Use them in combination with the shift key for fine adjustments.

 

Using "a" Values

There is a slider with "a=" on it. You can use "a" in your formula and then use the slider to change the value of "a" to see how it affects the graph.

Examples:

  • x^a
  • 2x-3a
  • sin(a*x)

Note how I used a*x to multiply a and x. If I used ax (or xa) the program just gets confused.

Saving Your Work

You can use the "Link" button to turn your formulas and zoom level into a web link.

You can print using the print button.

You can save the graph to disk.

The "svg" button will save the graph as a "Scalable Vector Graphics" file which can be edited using programs like Inkscape. Titles and numbers are not currently included, just the bare graphics.

Old Version

The old version is here.

 

All Functions

Operators

  + Addition operator
  - Subtraction operator
  * Multiplication operator
  / Division operator
  ^ Exponent (Power) operator

 

Functions

  sqrt Square Root of a value or expression.
  sin sine of a value or expression
  cos cosine of a value or expression
  tan tangent of a value or expression
  asin inverse sine (arcsine) of a value or expression
  acos inverse cosine (arccos) of a value or expression
  atan inverse tangent (arctangent) of a value or expression
  sinh Hyperbolic sine (sinh) of a value or expression
  cosh Hyperbolic cosine (cosh) of a value or expression
  tanh Hyperbolic tangent (tanh) of a value or expression
  exp e (the Euler Constant) raised to the power of a value or expression
  ln The natural logarithm of a value or expression
  log The base-10 logarithm of a value or expression
  floor Returns the largest (closest to positive infinity) value that is not greater than the argument and is equal to a mathematical integer.
  ceil Returns the smallest (closest to negative infinity) value that is not less than the argument and is equal to a mathematical integer.
  abs Absolute value (distance from zero) of a value or expression
  sign Sign (+1 or -1) of a value or expression
     

Constants

  pi The constant π (3.141592654...)
  e Euler's number (2.71828...), the base for the natural logarithm

 

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