simple cli calculator
calculator
Install
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or
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API
When starting calculator, it starts a node repl with all of the following properties set as properties of the GLOBAL object.
All Math properties are replaced with Math.(prop) so you can write var f = func('f(x) = sin(x)') instead of var f = func('f(x) = Math.sin(x)')
func
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derive
params ([string|function], point to evaluate function)
derive('f(x) = x*x', 2) //evaluate derivative @ x = 2; returns 4
integrate
params ([string|function], lower limit, upper limit)
derive('f(x) = x*x', 0, 1) //evaluate definite integral from x = 0 to x = 1; returns .333 = 1/3
accuracy
Set this property to determine how accurate the definite integral will be. Essentialy the "dx" in f(x)dx.
Default is 1/1000000
roundAccuracy
Set this property to determine the distance between an estimated answer and a whole number that you wish cli calc to return the rounded number.
This is useful when you know the answer is a whole number and you don't want something like 1.99999999998384 returned instead of 2
Repository
https://github.com/saambarati/node-calculator
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