Matlab - Srcrip generar matriz identidad y luego reemplazar con valores aleatorios

>> clear

M=eye(10)

M(M==0)=randi([2,9], 1,length(M(M==0)))

M =

     1     0     0     0     0     0     0     0     0     0

     0     1     0     0     0     0     0     0     0     0

     0     0     1     0     0     0     0     0     0     0

     0     0     0     1     0     0     0     0     0     0

     0     0     0     0     1     0     0     0     0     0

     0     0     0     0     0     1     0     0     0     0

     0     0     0     0     0     0     1     0     0     0

     0     0     0     0     0     0     0     1     0     0

     0     0     0     0     0     0     0     0     1     0

     0     0     0     0     0     0     0     0     0     1

M =

     1     6     2     8     6     3     2     3     2     5

     5     1     4     7     5     9     7     7     3     7

     6     7     1     9     9     2     2     6     3     7

     3     5     4     1     6     5     2     9     5     4

     5     4     7     9     1     3     6     7     8     5

     9     9     3     4     6     1     2     8     8     2

     6     2     7     7     8     9     1     5     2     9

     6     9     2     3     8     7     8     1     5     3

     3     9     7     2     6     6     8     5     1     2

     5     8     5     7     3     5     7     8     6     1