`newmat'
--------

newmat(ROW,COL [,[[A,B,...],[C,D,...],...]])
     :: ROW  COL ι.

RETURN
     
ROW,COL
     
A,B,C,D
     Ǥ

   * ROW  COL ι.  3 ʤ, ʬ 0 
     .  3 , ǥåξʬ, 
     ƹԤ, ꥹȤγ (ϤޤꥹȤǤ) ˤ
     . Ǥ, Ƭ˻Ȥ, ­ʤʬ 0 .
   * Υ `size()' .
   * `M' ΤȤ, `M[I]' ˤ `I' Ԥ٥ȥȤƼФ
     ȤǤ. Υ٥ȥ, ȤιʬͭƤ, 
     줫ʬ񤭴, ¾бʬ񤭴뤳Ȥˤ
     .
   * ȡΰȤƹϤ, Ϥ줿ȡ, ιʬ
     񤭴뤳ȤǤ.

     [0] A = newmat(3,3,[[1,1,1],[x,y],[x^2]]);
     [ 1 1 1 ]
     [ x y 0 ]
     [ x^2 0 0 ]
     [1] det(A);
     -y*x^2
     [2] size(A);
     [3,3]
     [3] A[1];
     [ x y 0 ]
     [4] A[1][3];
     getarray : Out of range
     return to toplevel


     `newvect', `size', `det'

