we use one matrix index like A(i) and even A(i,j). but can anyone explain me how A(i,j,k) or A(3,b,I) affects the output .

why and at what condition we need to use it?

[KSSV]

If your matrix is 3D then you need to index them by A(i,j,k)

Answer 1

[Walter Roberson]

https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html

https://www.mathworks.com/help/matlab/math/multidimensional-arrays.html

[Bishow Shrestha]

I studied them in detail and understood a lot ; though not all. Thanks . I will try to implement in my code which is suitable. It gave me different way of looking into codes.