Use MATLAB to: a$.$ Reconstruct the following image from the raw data posted on blackboard $($you first need to unzip the raw data text file$).$ The raw data includes x$,$y$,$z coordinates of each pixel in addition to the grayscale value $($a measure of brightness$/$darkness of each pixel with lower values indicating darker pixel$).$

Here is the data given:DO NOT COPY

DO NOT COPY

DO NOT COPY

Here is the code I have:

data $=$ textscan$(\text{'}$Chest$\_$Xray$\_$Raw$\_$Data.txt$\text{'},\text{'}\%$f$\%$f$\%$f$\%$f$\text{'},$ 'Delimiter', $\text{'},\text{'})$;

$\%$ Extract x$,$ y$,$ z coordinates and grayscale values

x $=$ data$\{1\}$;

y $=$ data$\{2\}$;

z $=$ data$\{3\}$; $\%$ If needed, otherwise ignore

grayscale $=$ data$\{4\}$;

$\%$ Determine the size of the image

maxX $=$ int$64($max$($x$))$;

maxY $=$ int$64($max$($y$))$;

$\%$ Normalize coordinates to fit into the pixel grid

x $=$ round$($x $-$ min$($x$)+1)$;

y $=$ round$($y $-$ min$($y$)+1)$;

$\%$ Initialize the image matrix

imageMatrix $=$ zeros$($maxY$,$ maxX$)$;

$\%$ Populate the image matrix with grayscale values

for i $=1$:length$($x$)$

imageMatrix$($y$($i$),$ x$($i$))=$ grayscale$($i$)$;

end

$\%$ Display the image

figure;

imshow$($imageMatrix$,[])$;

title$(\text{'}$Reconstructed Image from Raw Data'$)$;

colormap$($gray$)$; $\%$ Use grayscale colormap

colorbar;

However, I only get the color bar and no image. How do I fix this?