@rayyamhk/matrix/lib/core/properties/nullity.js

A professional, comprehensive and high-performance library for you to manipulate matrices.

"use strict";

/**
 * Calculates the nullity of any Matrix, which is the dimension
 * of the nullspace.<br><br>
 * 
 * The nullity is cached.
 * @memberof Matrix
 * @instance
 * @returns {number} The nullity of the matrix
 */
function nullity() {
  if (this._nullity !== undefined) {
    return this._nullity;
  }

  var col = this.size()[1];
  var rank = this.rank();
  this._nullity = col - rank;
  return this._nullity;
}

;
module.exports = nullity;