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ndarray-diagonal

Extract a view of the diagonal entries of an ndarray (no copying necessary!)

Example

var pack = require('ndarray-pack')
var diagonal = require('ndarray-diagonal')
var show = require('ndarray-show')

var M = pack([[1, 0, 2],
              [2, 3, 1],
              [4, 5, 0]])

var diag = diagonal(M)


console.log('diag=\n', show(diag))

//diag is actually a view of the entries of M

diag.set(2,  1e5)  //Update the 3rd diagonal entry
console.log('M=\n', show(M))

Output:

diag=
   1.000    3.000    0.000

M=
   1.000    2.000    4.000
   0.000    3.000    5.000
   2.000    1.000  1.00e+5

API

require('ndarray-diagonal')(M)

Construct a view of the diagonal entries of an ndarray

• M is an ndarray

Returns A view of the diagonal entries of M

Credits

(c) 2014 Mikola Lysenko. MIT License