How to set x axis in a plot?

Hello, I would like to know if is possible to set the X- axis like the plot that I loaded. I make the x-axis in pain just as an example of what I would like to do.

Answer 1

[Chunru]

subplot(6,1,1:5); imagesc([1 8], [14, 22], randi(100,100));
subplot(8,1,8);
imagesc([1 8], 1, [1 2 2 2 2 2 2 3 3]);
set(gca, 'XTick', [], 'YTick', [])
text(4, 1, 'G3');  

[Fabian Moreno]

Thank you!

Answer 2

[Image Analyst]

rgbImage = imread('peppers.png');
imshow(flipud(rgbImage), 'XData', 1:8, 'YData', 14:22);
axis('on', 'xy')