MATLAB: How i can plot gray-scale image values

2-d plottingplotting

I want to 2-D plot the grayscale image values.The below code plot the 3-D values of a grayscale image.What i can use 
instead of meshgrid function to plot 2-D values of a gray scale image.Please see the pictures for more details.
Ix = imread('C:\Users\Haseeb\Desktop\images\capture.jpg');
I= rgb2gray(Ix);
x = 1:size(I,1);
y = 1:size(I,2);
[X,Y] = meshgrid(x,y);
figure,plot3(X,Y,I)

Best Answer

You can plot it using histcounts().
counts = histcounts(grayImage, 0:256)
plot(counts)
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