MATLAB: Third index in three dimention array

3dindex

kindly explain me about the following line
Vt = zeros(img_h, img_w, 4);
i know the following line if(img_h=2, img_w=3)
zeros (img_h, img_w)=[0 0 0; 0 0 0]
but i cant clearly understand the third dimention

Best Answer

  • You matrices can be 1D, 2D, 3D or nD...where D stands for dimensional. 
    A = zeros(2,2,2) ;
    The above A has 2 matrices of size 2X2 having zeros. 
    B = ones(3,4,5) ;
    The above matrix has 5 matrices each os size 3*4. 
    I = imread("cameraman.tif") ; 
    size(I)
    Check the size of I above. So nD matrices are possible, in your case third dimension stands for that.