My Expression Maker

With this app you can create custom user expressions.

Register any expression using + - * / ^, group operations with () and use predefined math functions.

You can add variables to your expressions. Add a variable in the form of [varname], where varname is the name of the var to ask at evaluation moment. NOTE: Brackets are required. i.e: ([x]*9/5)+32

Sample usage:

([x]*9/5)+32

Advanced usage:

a=[c0]+5

f(x,y)=x^2+2*x*y+y^2

[c1]^2+(5*f(2,3))

Then evaluate your functions.

Predefined values:

- pi, Get value of pi

- e, Get value of e

Available functions:

- sqrt(value), Square root

- abs(value), Absolute value

- ln(value), Natural logarithm

- log(value), Base-10 logarithm

- ceil(value), Round fractions up

- floor(value), Round fractions down

- round(value), Rounds a float

- sin(value), Sine

- sinh(value), Hyperbolic sine

- asin(value), Arc sine

- asinh(value), Inverse hyperbolic sine

- cos(value), Cosine

- cosh(value), Hyperbolic cosine

- acos(value), Arc cosine

- acosh(value), Inverse hyperbolic cosine

- tan(value), Tangent

- tanh(value), Hyperbolic tangent

- atan(value), Arc tangent

- atanh(value), Inverse hyperbolic tangent

EvalMath - PHP Class to safely evaluate math expressions

Copyright (C) 2005 Miles Kaufmann