Error using cd Cannot CD to /Users/man​anmehta/Do​cuments/MA​TLAB/datas​et/1 (Name is nonexistent or not a directory). Error in load_database (line 12) cd(strcat(​'/Users/ma​nanmehta/D​ocuments/M​ATLAB/data​set/',num2​str(i)));

function out=load_database()
% We load the database the first time we run the program.

persistent loaded;
persistent w;
status=mkdir('/Users/mananmehta/Documents/MATLAB/dataset/stereo-pairs/cones');
disp(status);

if(isempty(loaded))
    v=zeros(10304,400);
    for i=1:40
        cd(strcat('/Users/mananmehta/Documents/MATLAB/dataset/',num2str(i)));
        for j=1:10
            a=imread(strcat(num2str(j),'.png'));
            v(:,(i-1)*10+j)=reshape(a,size(a,1)*size(a,2),1);
        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;

[Jason Ross]

edited for readability

Answer 1

[Jason Ross]

You are making a directory '/Users/mananmehta/Documents/MATLAB/dataset/stereo-pairs/cones' but then changing directory to '/Users/mananmehta/Documents/MATLAB/dataset/'.

Should you be changing directory to '/Users/mananmehta/Documents/MATLAB/dataset/stereo-pairs/cones'

If this is the case, I'd suggest putting the directory name in a variable and then using the variable in both places to avoid this kind of error.