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: Sources2D.m
    path of file: ./repos/CaImAn-MATLAB/Sources2D
    
    the code of the file until where you have to start completion: classdef Sources2D < handle
    
    % This class is a wrapper of Constrained NMF for standard 2D data.
    % Author: Pengcheng Zhou, zhoupc1988@gmail.com with modifications from
    % Eftychios
    
function initComponents(obj, K, tau)
            if nargin<4 ;    tau = [];             end
            [obj.A, obj.C, obj.b, obj.f, obj.cm] = initialize_components(obj.Y, K, tau, obj.options);
            obj.Cn =  reshape(obj.P.sn,obj.options.d1,obj.options.d2); 
            %correlation_image(obj.Y); %max(obj.Y,[],3); %std(obj.Y,[],3); %
            % image statistic (onlobj.y for displaobj.y purposes)
            obj.tau;
            obj.K;
        end