# Method Math.Matrix()->norm2()

Method norm2

  `float norm()`
  `float norm2()`
  `Matrix normv()`

Description

  Norm of the matrix, and the square of the norm of the matrix. (The later method is because you may skip a square root sometimes.)

  This equals |A| or sqrt( A02 + A12 + ... + An2 ).

  It is only usable with 1xn or nx1 matrices.

  `m->normv()` is equal to `m*(1.0/m->norm())`, with the exception that the zero vector will still be the zero vector (no error).