StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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132 lines
2.3 KiB
132 lines
2.3 KiB
big-rat
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=======
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Arbitrary precision rational number arithmetic
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[](http://travis-ci.org/rat-nest/big-rat)
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# Example
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#### Program
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```javascript
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var rat = require('big-rat')
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//Construct a pair of rational numbers;
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// a = 1/10
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// b = 2/10
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var a = rat(1, 10)
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var b = rat(2, 10)
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//Compute their sum
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var add = require('big-rat/add')
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var c = add(a, b)
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//Print out sum
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var toString = require('big-rat/to-string')
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console.log('a+b=', toString(c))
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//And also convert to a number
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var toFloat = require('big-rat/to-float')
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console.log('exact rational result:', toFloat(c))
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//For comparison, here is the same computation performed with floats
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var x = 0.1
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var y = 0.2
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console.log('approximate float result:', x + y)
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```
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#### Output
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```
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a+b= 3/10
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exact rational result: 0.3
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approximate float result: 0.30000000000000004
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```
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# Install
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```
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npm i big-rat
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```
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# API
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#### `var r = require('big-rat')(n[, d])`
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Constructs a rational number as the quotient n/d
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* `n` is the numerator. Can be a float, string, bignum or rational
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* `d` is the denominator (optional, default `1`)
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**Returns** A rational number
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#### `var f = require('big-rat/to-float')(r)`
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**Returns** The closest floating point number to `r`
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#### `var s = require('big-rat/to-string')(r)`
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**Returns** A string representing the big rat `r`
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#### `var b = require('big-rat/is-rat')(r)`
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**Returns** `true` if `r` is a big rat
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#### `var c = require('big-rat/add')(a, b)`
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**Returns** `a+b`
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#### `var c = require('big-rat/sub')(a, b)`
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**Returns** `a-b`
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#### `var c = require('big-rat/mul')(a, b)`
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**Returns** `a*b`
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#### `var c = require('big-rat/div')(a, b)`
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**Returns** `a/b`
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#### `var c = require('big-rat/neg')(a)`
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**Returns** `-a`
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#### `var c = require('big-rat/recip')(a)`
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**Returns** `1/a`
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#### `var c = require('big-rat/sign')(a)`
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**Returns** One of the following values:
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* `-1` if `a<0`
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* `0` if `a=0`
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* `+1` if `a>0`
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#### `var c = require('big-rat/abs')(a)`
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**Returns** `|a|`
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#### `var c = require('big-rat/min')(a, b)`
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**Returns** `min(a,b)`
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#### `var c = require('big-rat/max')(a, b)`
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**Returns** `max(a,b)`
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#### `var c = require('big-rat/equals')(a, b)`
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**Returns** `true` if `a=b`, `false` otherwise
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#### `var c = require('big-rat/cmp')(a, b)`
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**Returns**
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* `-1` if `a<b`
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* `0` if `a=b`
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* `+1` if `a>b`
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# License
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(c) 2015 MIT License
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