https://github.com/mikolalysenko/ndarray-segment

Run length encoded sparse ndarray
https://github.com/mikolalysenko/ndarray-segment

Last synced: about 2 months ago
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Run length encoded sparse ndarray

• Host: GitHub
• URL: https://github.com/mikolalysenko/ndarray-segment
• Owner: mikolalysenko
• License: mit
• Created: 2013-06-27T01:57:11.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2013-06-27T01:58:39.000Z (over 11 years ago)
• Last Synced: 2024-10-20T14:27:25.568Z (2 months ago)
• Language: JavaScript
• Size: 105 KB
• Stars: 6
• Watchers: 5
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
ndarray-segment

===============

[ndarrays](http://github.com/mikolalysenko/ndarray) with run length encoded data storage.

# Example

```javascript

var ndseg = require("ndarray-segment")

var ops = require("ndarray-ops")

//Create a 100x100 segment array

var x = ndseg([100, 100])

//Fill in a block with a constant value

ops.assigns(x.hi(50,50).lo(30, 20), 1)

```

# Install

```javascript

npm install ndarray-segment

```

# API

```javascript

var ndseg = require("ndarray-segment")

```

## Constructor

The default ndseg function supports several different conventions for usage:

### `ndseg(shape)`

Creates a sparse ndarray with the given shape initialized to 0

* `shape` is the shape of the ndarray

**Returns** A new ndarray with the given shape

### `ndseg(array)`

Converts the given ndarray into a sparse segment tree

* `array` is an ndarray

**Returns** A sparse ndarray representing the same data as `array`

### `ndseg(data, shape)`

Creates an ndarray from the given data store and shape

* `data` is a 1D array

* `shape` is the shape of the ndarray to construct from it

**Returns** A sparse ndarray encoding of `data`

# Credits

(c) 2013 Mikola Lysenko. MIT License