bisection-js

simple 1D bisection function (to find roots of equations)

call to getRootOf() return NaN if no point founded, or root value otherwise.

number|NaN getRootOf(
	function f[,
	number guessPoint[,
	number increment[,
	number tollerance[,
	<other function f parameters...>]]]
	)

Example: find root of 5 a - 3 b = -c, where b = 3 and c = 2.5. getRootOf should return value of a.

function anyFunction(a,b,c){
  return 5*a-3*b+c
}

var test = getRootOf(
	//function
	anyFunction,
	//parameters:
	// * guess point
	// * increment to find two values of opposite sign
	// * tollerance
	0.1, 0.2, 1e-18,
	//this ones are the last 2 variables (b,c) of anyFunction
	3, 2.5);

if parameters of getRootOf are undefined, the default values are:

guess point: 0
increment: 0.1
tollerance: 1e-4