gray co matrix

I have a matrix A=[2 4 1 2 ;2 1 2 4; 2 3 1 2 ;1 3 3 2]

pleas etell how to get graycomatrix for this,and how is generates the gray co matrix

Answer 1

[supriya]

A=[2 4 1 2 ;2 1 2 4; 2 3 1 2 ;1 3 3 2] [glcm,SI] = graycomatrix(A,'NumLevels',9,'G',[]);

%The values in SI are between 1 and NumLevels. %'numlevels'=Integer specifying the number of gray-levels to use when scaling the grayscale values in I. For example, if NumLevels is 8, graycomatrix scales the values in I so they are integers between 1 and 8. The number of gray-levels determines the size of the gray-level co-occurrence matrix (glcm). By default-8 (numeric),2 (binary)

[kash]

thanks supriya,what will happen if i give Numlevel as 4