`newmat'
--------

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

RETURN
     s
ROW,COL
     R
A,B,C,D
     C

   * ROW s COL ̍s𐶐.  3 Ȃꍇ, e 0 
     .  3 ꍇ, CfbNX̏, 
     es, Xg̊evf (͂܂Xgł) ɂ菉
     . evf, 擪珇Ɏg, Ȃ 0 ߂.
   * s̃TCY `size()' œ.
   * `M' ŝƂ, `M[I]' ɂ `I' sxNgƂĎo
     Ƃł. ̃xNg, Ƃ̍sƐLĂ, 
     ꂩ̐, ̑Ή鐬邱Ƃɂ
     .
   * ̈Ƃčsnꍇ, nꂽ, ̍s̐
     邱Ƃł.

     [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

Q
     `newvect', `size', `det'

