function t = vectorise(f)
% returns a column vector

% Need to clean this up

if ndims(f) > 2
    f = squeeze(f);
    t = reshape(f, size(f,1)*size(f,2)*size(f,3), 1); 
    
elseif ndims(f) == 2
    f = f';
    t = reshape(f, size(f,1)*size(f,2), 1); 
    
end