need help in matlab coding. This is the previous code: quantized$\_$N $=$ zeros$($size$($N$),$ 'uint$8\text{'})$; $\%$ Initialize the quantized image matrix

$\%$ Loop over all rows and columns of the image matrix

for i $=1$:size$($N$,1)$

for j $=1$:size$($N$,2)$

if N$($i$,$ j$)>=0$ && N$($i$,$ j

N$($i$,$ j$)=0$;

elseif N$($i$,$ j$)>=65$ && N$($i$,$ j

N$($i$,$ j$)=1$;

elseif N$($i$,$ j$)>=129$ && N$($i$,$ j

N$($i$,$ j$)=2$;

else

N$($i$,$ j$)=3$;

end

end

end