ndarray-prefix-sum

Computes a prefix sum of an array, or in higher dimensions the summed area table of an image. Works both in node.js and in the browser. Built on top of ndarray.

Example

var ndarray = require("ndarray")
var prefixSum = require("ndarray-prefix-sum")
 
var x = ndarray(new Float32Array([1, 2, 3, 4, 5, 6]))
 
prefixSum(x)
 
for(var i=0; i<x.shape[0]; ++i) {
  console.log(x.get(i))
}

Install

npm install ndarray-prefix-sum

API

require("ndarray-prefix-sum")(array)

Computes the prefix sum of array in place.

• array is an ndarray

Returns array

Credits

(c) 2013 Mikola Lysenko. MIT License