MATLAB: How to get the mode of a 3d-array

3d arraymodemost frequent valuesmrivolumetric image

Dear experts,

how do I get the mode of a 3D array with dim [51 75 55]. It can only contain numbers from 0:12 and I'm not interested in the zeros.

 mode(nonzeros(yourArray)),

squeeze(yourarray)

permute(yourarray, [2 3 1])

squeeze is simpler and will get rid of all singleton dimensions.

You can reformulate the loop as convolution of

A = accumarray([x(:) y(:) z(:)]-length(Small)/2,1,[500 500 500])

and

B = flip(flip(flip(Small,1),2),3)

(I left out the detail of overflowed for simplicity)

You might look at convn function. The problem I see is that A is sparse (1/125 in density) and might not be efficient as for loop.

You also might try this FEX to see if you can exploit the sparsity

Or this one using different method of compute convolution