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Filling A Matrix With Copies of Another Matrix
Syntax z = fill(x, m, n)
z = fill(x,[m , n])
See Also repmat , ones , zeros , fillrows , fillcols

Description
Returns a matrix z with m x n subblocks each of which is equal to x. The return matrix has the same type as x, has m times as many rows as x and n times as many columns as x. The (i,j)-th element of the return value is given by
     z    = x
     i,j     mod(i-1,m)+1 , mod(j-1,n)+1 
The arguments m and n can be integer, real, or double-precision. If they are not integer, only their integer .

Example
For a scalar x example, enter
     fill(1.5, 2, 3)
 which returns
     {
     [ 1.5 , 1.5 , 1.5 ]
     [ 1.5 , 1.5 , 1.5 ]
     }
 For a matrix x example, enter
     fill([2.5 , 3.5], [2, 2])
 which returns
     {
     [ 2.5 , 3.5 , 2.5 , 3.5 ]
     [ 2.5 , 3.5 , 2.5 , 3.5 ]
     }
Empty Matrices
You can use the fill command to create empty matrices. If you enter
     x = fill(1, 0, 3)
     print type(x), rowdim(x), coldim(x)
 O-Matrix will respond
     int 0 3
Mlmode
In Mlmode , this function is called repmat instead of fill. If in Mlmode you enter,
     repmat([2.5 , 3.5],  [2 , 2])
 which returns
     {
     [ 2.5 , 3.5 , 2.5 , 3.5 ]
     [ 2.5 , 3.5 , 2.5 , 3.5 ]
     }