You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: LNMF.m
    path of file: ./repos/lrslibrary/algorithms/nmf/LNMF
    
    the code of the file until where you have to start completion: function [W, H, out] = LNMF(X, d, options)

% Spatially Localized Non-negative Matrix Factorization (LNMF)

% Reference:

    
function [W, H, out] = LNMF(X, d, options)

% Spatially Localized Non-negative Matrix Factorization (LNMF)

% Reference:
%   S. Z. Li, X. Hou, H. Zhang, and Q. Cheng, "Learning spatially
%   localized, parts-based representation," in IEEE Conference on Computer Vision and Pattern Recognition, 2001, pp. 207–212.

% Written by Naiyang Guan (ny.guan@gmail.com)

[p, m] = size(X);

% Input arguments check out
if ~exist('options', 'var')
    options = [];
end