Test if two floats are almost equal

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2801.1.07 years ago10 years agoMinified + gzip package size for almost-equal in KB


almost-equal ============ Checks when two floats are almost equal. Use === First install using npm:
npm install almost-equal
Then use as follows: ```javascript var almostEqual = require("almost-equal") var a = 100 , b = 100 + 1e-12 //Check if a == b up to float precision console.log(almostEqual(a, b, almostEqual.FLTEPSILON, almostEqual.FLTEPSILON)) //Check if a == b up to double precision console.log(almostEqual(a, b, almostEqual.DBLEPSILON, almostEqual.DBLEPSILON)) ```

almostEqual(a, b[, absoluteTolerance [, relativeTolerance]])

Checks if two floats are within the given tolerances of one another using the formula:
|a - b| < max(absoluteTolerance, min(|a|, |b|) * relativeTolerance)
  • a and b are the two numbers to comapre
  • absoluteTolerance is a fixed minimal tolerance (set to 0 to ignore)
  • relativeTolerance is a tolerance that scales with a/b (set to 0 to ignore)
Returns true if a and b are approximately equal. If tolerance argument is omitted, almostEqual.DBL_EPSILON value is used by default.


Floating point (32-bit) epsilon


Double precision (64-bit) epsilon Credits ======= (c) 2013 Mikola Lysenko. MIT License