ndarray-stats v1.0.0

ndarray-stats

Calculates summary statistics for an ndarray.

Only works with 1 or 2 dimensional arrays and aggregates by column.

Examples

1 Dimension

var ndarray = require('ndarray');
var ndarrayStats = require('ndarray-stats');

var A = ndarray([1, 2, 3, 4, 5, 6], [6]);
var r = ndarrayStats(A);

// r is now an object with summary stats
//
// r = {
//   count: 6,
//   max: 6,
//   mean: 3.5,
//   min: 1,
//   std: 1.8708286933869707,
//   sum: 21,
//   sum_of_squares: 91,
//   variance: 3.5
// }

2 Dimensions

var ndarray = require('ndarray');
var ndarrayStats = require('ndarray-stats');

var A = ndarray([1, 2, 3, 4, 5, 6, 7, 8, 9], [3, 3]);
var r = ndarrayStats(A);

// r is now an array of objects with summary stats, one for each column
//
// r[0] = {
//   count: 3,
//   max: 7,
//   mean: 4,
//   min: 1,
//   std: 3,
//   sum: 12,
//   sum_of_squares: 66,
//   variance: 9
// }

Install

npm install ndarray-stats

Credits

(c) 2016 Foy Savas. MIT License