How to split a 2xN matrix into multiple 2x2 matrices?

How to split a 2xN matrix into multiple 2x2 matrices? and multiply them.

Answer 1

[Dyuman Joshi]

%Assuming N is a multiple of 2
y = randi(10, 2, 16)

y = 2×16

1 9 5 10 8 7 10 9 1 1 2 8 2 8 10 7 8 2 7 10 8 6 2 9 7 6 1 9 2 4 2 2

%Reshaping into 2x2 blocks
y = reshape(y, 2, 2, [])

y = 
y(:,:,1) =

     1     9
     8     2


y(:,:,2) =

     5    10
     7    10


y(:,:,3) =

     8     7
     8     6


y(:,:,4) =

    10     9
     2     9


y(:,:,5) =

     1     1
     7     6


y(:,:,6) =

     2     8
     1     9


y(:,:,7) =

     2     8
     2     4


y(:,:,8) =

    10     7
     2     2

z = y(:,:,1);
for k=2:size(y,3)
    z = z*y(:,:,k);
end


z

z = 2×2

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