Equation Grapher
Enter an Equation using the variables x and/or y and an =, press Go:
Description
It can plot an equation where x and y are related somehow (not just y=...), like these:
Examples:
- x^2+y^2=9 (an equation of a circle with a radius of 3)
- sin(x)+cos(y)=0.5
- 2x−3y=1
- cos(x^2)=y
- (x−3)(x+3)=y^2
- y=x^2
If you don't include an equals sign, it will assume you mean "=0"
It has not been well tested, so have fun with it, but don't trust it.
If it gives you problems, let me know.
Note: it may take a few seconds to finish, because it has to do lots of calculations.
If you just want to graph a function in "y=..." style you may prefer Function Grapher and Calculator
Zooming
Use the zoom slider (to the left zooms in, to the right zooms out).
To reset the zoom to the original bounds click on the Reset button.
Dragging
Click-and-drag to move the graph around. If you just click-and-release (without dragging), then the spot you clicked on will be the new center
Note: the plots use computer calculations. Round-off can cause errors or values can be missed completely.
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 (Euler's number) 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. | |
| round | Round to the nearest integer. Examples: round(−2.5) = −2, round(-0.1) = 0, round(0.1) = 0, round(2.5) = 3 | |
| 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 (3.14159265...) | |
|---|---|---|
| e | Euler's number (2.71828...), the base for the natural logarithm |