asciichart

    

Console ASCII line charts in pure Javascript (for NodeJS and browsers) with no dependencies. This code is absolutely free for any usage, you just do whatever the fuck you want.

Usage

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``sh
npm install asciichart
`

`javascript
var asciichart = require ('asciichart')
var s0 = new Array (120)
for (var i = 0; i < s0.length; i++)
s0[i] = 15 Math.sin (i ((Math.PI * 4) / s0.length))
console.log (asciichart.plot (s0))
`

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`html












`

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The width of the chart will always equal the length of data series. The height and range are determined automatically.

`javascript
var s0 = new Array (120)
for (var i = 0; i < s0.length; i++)
s0[i] = 15 Math.sin (i ((Math.PI * 4) / s0.length))
console.log (asciichart.plot (s0))
`

The output can be configured by passing a second parameter to the plot (series, config) function. The following options are supported:
`javascript
var config = {

offset: 3, // axis offset from the left (min 2)
padding: ' ', // padding string for label formatting (can be overrided)
height: 10, // any height you want

// the label format function applies default padding
format: function (x, i) { return (padding + x.toFixed (2)).slice (-padding.length) }
}
`

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`javascript
var s = []
for (var i = 0; i < 120; i++)
s[i] = 15 Math.cos (i ((Math.PI * 8) / 120)) // values range from -15 to +15
console.log (asciichart.plot (s, { height: 6 })) // this rescales the graph to ±3 lines
`

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`javascript
var s2 = new Array (120)
s2[0] = Math.round (Math.random () * 15)
for (i = 1; i < s2.length; i++)
s2[i] = s2[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))
console.log (asciichart.plot (s2))
`

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`javascript
var s2 = new Array (120)
s2[0] = Math.round (Math.random () * 15)
for (i = 1; i < s2.length; i++)
s2[i] = s2[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))

var s3 = new Array (120)
s3[0] = Math.round (Math.random () * 15)
for (i = 1; i < s3.length; i++)
s3[i] = s3[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))

console.log (asciichart.plot ([ s2, s3 ]))
`

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`javascript
var arr1 = new Array (120)
arr1[0] = Math.round (Math.random () * 15)
for (i = 1; i < arr1.length; i++)
arr1[i] = arr1[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))

var arr2 = new Array (120)
arr2[0] = Math.round (Math.random () * 15)
for (i = 1; i < arr2.length; i++)
arr2[i] = arr2[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))

var arr3 = new Array (120)
arr3[0] = Math.round (Math.random () * 15)
for (i = 1; i < arr3.length; i++)
arr3[i] = arr3[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))

var arr4 = new Array (120)
arr4[0] = Math.round (Math.random () * 15)
for (i = 1; i < arr4.length; i++)
arr4[i] = arr4[i - 1] + Math.round (Math.random () * (Math.random () > 0.5 ? 2 : -2))

var config = {
colors: [
asciichart.blue,
asciichart.green,
asciichart.default, // default color
undefined, // equivalent to default
]
}

console.log (asciichart.plot([ arr1, arr2, arr3, arr4 ], config))
``

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A util by madnight for drawing Bitcoin/Ether/altcoin charts in command-line console: bitcoin-chart-cli.

!bitcoin-chart-cli

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Special thx to all who helped port it to other languages, great stuff!

- Python port included!
- Java: ASCIIGraph, ported by MitchTalmadge. If you're a Java-person, check it out!
- Go: asciigraph, ported by guptarohit, Go people! )
- Haskell: asciichart, ported by madnight to Haskell world!
- Ruby: ascii_chart, ported by zhustec!
- Elixir: asciichart, ported by sndv!
- Perl: App::AsciiChart, ported by vti!
- C: plot, ported by annacrombie with a ruby extension!
- R: asciichartr, ported by blmayer!
- Rust: rasciigraph, ported by orhanbalci!
- PHP: PHP-colored-ascii-linechart, ported by noximo!
- C#: asciichart-sharp, ported by samcarton!

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- levels and points on the graph!
- even better value formatting and auto-scaling!

!preview