CodePlexProject Hosting for Open Source Software

Function | Description |
---|---|

abs | Absolute Value |

acos | Arccosine |

asin | Arcsine |

atan | Arctangent |

cos | Cosine |

degrees | Convert radians to degrees |

even | Rounds up to the nearest even integer |

fact | Factorial – Example: fact(5) = 5 * 4 * 3 * 2 * 1 |

gcf | Greatest Common Factor (Included as an example math function) |

log | log(number,base) |

log10 | Log Base 10 of a number |

max | Maximum Value – Can take multiple parameters |

min | Minimum Value – Can take multiple parameters |

neg | Internal Use A negative number neg 1 = -1 |

odd | Rounds up to the nearest odd integer |

power | power(a,b) = a^b |

radians | Convert degrees to radians |

randbetween | A random number between the two numbers passed – Example: randbetween(1,10) |

round | Rounds the number 1 to the number 2’s number of decimal places. |

sign | 1 if positive, 0 if 0, -1 if less than 0 |

sin | Sine |

sqrt | Square Root |

tan | Tangent |

trunc | Remove anything after the decimal place. |

More funcitons can be added in EqOperator.cs. Just add more lines to the static constructor. There are multiple constructors for adding new functions and operators. In EqOperator.cs there are also examples. Below is an example of how to add the log function:

Operators.Add("log", new EqOperator("log", TokenCategory.Function, 2, p => Math.Log(p[1], p[0])));

Functions can also use custom methods, gcf is an example of using a function instead of a lamda expression:

/// <summary> /// GCF is an example function to show how you can add more functions to this math library. /// </summary> /// <param name="p">The array of parameters</param> /// <returns>The double result</returns> private static double GCF(double[] p) { var i = new int[p.Length]; var min = 0; for (var j = 0; j < p.Length; j++) { i[j] = Convert.ToInt32(Math.Truncate(p[j])); if (i[j] != p[j]) { throw new ArgumentException("Error: gcf paramters must be integers (whole numbers)."); } if (Math.Abs(i[j]) < min) { min = Math.Abs(i[j]); } } int n; for (n = min; n > 0; n--) { var x = n; if (i.All(t => x % t == 0)) { return x; } } return 1; }

Last edited Jul 7, 2010 at 4:10 PM by carltoncolter, version 2