"To RESHAPE the number of elements must not change".This error occurs in line18.how to correct this error?

function out=load_database();
% We load the database the first time we run the program.
clear all;
close all;
clc;
persistent loaded;
persistent w;
if(isempty(loaded))
    v=zeros(10304,400);
    for i=1:2
        cd(num2str(i));
        k=1;
        img=dir('*.jpg');
        nfiles=length(img);
        disp(nfiles)
        for j=1:12
            a=imread(strcat('Image',num2str(k),'.jpg'));
            v(:,(i-1)*12+j)=reshape(a,size(a,1),size(a,1),1);
            k=k+20;
        end
        
        cd ..
    end
   w=uint8(v); % Convert to unsigned 8 bit numbers to save memory. 
end
loaded=1;   % Set 'loaded' to aviod loading the database again. 
out=w;

Answer 1

[James Tursa]

This expression is only going to work if size(a,1)*size(a,1) = numel(a):

reshape(a,size(a,1),size(a,1),1);

What are you trying to do with that line of code? What is size(a)?