lcmdiag

Scilab Function
Last update : 25/04/2007

lcmdiag - least common multiple diagonal factorization

### Calling Sequence

  `[N,D]=lcmdiag(H)`
  `[N,D]=lcmdiag(H,flag)`

### Parameters

- `H` : rational matrix
- `N` : polynomial matrix
- `D` : diagonal polynomial matrix
- `flag` : character string: `'row'` or `'col'` (default)

### Description

`[N,D]=lcmdiag(H,'row')` computes a factorization `D*H=N` , i.e. `H=D^(-1)*N` where D is a diagonal matrix with D(k,k)=lcm of kth row of H('den').

`[N,D]=lcmdiag(H)` or `[N,D]=lcmdiag(H,'col)` returns `H=N*D^(-1)` with diagonal D and D(k,k)=lcm of kth col of H('den')

### Examples

    s=poly(0,'s');
    H=[1/s,(s+2)/s/(s+1)^2;1/(s^2*(s+2)),2/(s+2)];
    [N,D]=lcmdiag(H);
    N/D-H

### See Also

`lcm` , `gcd` , `bezout` ,