# w-fft
A tool for FFT.

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## Documentation
To view documentation or get support, visit [docs](https://yuda-lyu.github.io/w-fft/global.html).

## Example
To view some examples for more understanding, visit examples:
> **spectrum1d:** [ex-spectrum1d.html](https://yuda-lyu.github.io/w-fft/examples/ex-spectrum1d.html) [[source code](https://github.com/yuda-lyu/w-fft/blob/master/docs/examples/ex-spectrum1d.html)]

## Installation

### Using npm(ES6 module):
```alias
npm i w-fft
```

#### Example for FFT1D and iFFT1D:
> **Link:** [[dev source code](https://github.com/yuda-lyu/w-cluster/blob/master/g-fft1d.mjs)]
```alias

let arr
let res

arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
res = wf.fft1d(arr)
console.log(res)
// => [
//   [ 120, 0 ],
//   [ -8, 40.21871593700678 ],
//   [ -8, 19.31370849898476 ],
//   [ -8.000000000000002, 11.972846101323912 ],
//   [ -8, 8 ],
//   [ -7.999999999999999, 5.345429103354391 ],
//   [ -8, 3.3137084989847594 ],
//   [ -8.000000000000002, 1.5912989390372623 ],
//   [ -8, 0 ],
//   [ -8, -1.5912989390372623 ],
//   [ -7.999999999999999, -3.3137084989847594 ],
//   [ -7.999999999999998, -5.345429103354393 ],
//   [ -7.999999999999999, -8 ],
//   [ -7.999999999999999, -11.97284610132391 ],
//   [ -7.999999999999997, -19.31370849898476 ],
//   [ -7.999999999999993, -40.21871593700678 ]
// ]

arr = [
    [120, 0],
    [-8, 40.21871593700678],
    [-8, 19.31370849898476],
    [-7.999999999999999, 11.972846101323913],
    [-8, 8],
    [-8, 5.345429103354391],
    [-8, 3.313708498984761],
    [-7.999999999999999, 1.5912989390372623],
    [-8, 0],
    [-7.999999999999999, -1.5912989390372623],
    [-8, -3.313708498984761],
    [-8, -5.345429103354391],
    [-8, -8],
    [-7.999999999999999, -11.972846101323913],
    [-8, -19.31370849898476],
    [-8, -40.21871593700678]
]
res = wf.ifft1d(arr)
console.log(res)
// => [
//                    0,                  1,
//   2.0000000000000004, 3.0000000000000013,
//                    4,  5.000000000000002,
//                    6,  7.000000000000001,
//                    8,                  9,
//                   10, 10.999999999999998,
//                   12, 12.999999999999998,
//                   14,                 15
// ]

```

### In a browser(UMD module):

Add script for w-fft.
```alias
<script src="https://cdn.jsdelivr.net/npm/w-fft@1.0.11/dist/w-fft.umd.js"></script>

```