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Normalize N-D Vectors in Single Matrix or N Component Matrices

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Normalizes N-D vectors provided either in one matrix, or as multiple component matrices.

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NORMVEC normalize vector(s).
  NORMVEC computes the unit vectors in the direction of the vectors
  provided. It can process two types of arguments:

      1) single matrix of vectors
      2) multiple matrices of vector components
         (as those returned by MESHGRID and NDGRID)

  In both cases, the p-norm to be used can be specified.
  The default is the 2-norm (Euclidean).

  Only in the first case, the matrix dimension along which the vectors
  are defined can be defined. The default is the first non-singleton
  This behavior is derived from VNORM (FEX id=#10708, by Winston Smith),
  which is called by this function.

  Zero vectors are normalized to 0 and NOT to NaN.

usage

Case A: matrix of N-dimensional column vectors
  [v] = NORMVEC(v)
  [v] = NORMVEC(v, 'p', n)
  [v] = NORMVEC(v, 'p', n, 'dim', d)

  v = matrix of column vectors
    = [#dimensions x #vectors]
  n = p-norm selected (e.g. 2 is the Euclidean norm ||.||_2)
  d = norm for vectors defined along dimension d of matrix v
    >= 1
    or [] (vectors along first non-singleton dimension)

Case B: 2 component matrices of 2-dimensional vectors
  [px, py] = NORMVEC(px, py)
  [px, py] = NORMVEC(px, py, 'p', n)

  px = matrix [M x N] of x vector components
  py = matrix [M x N] of y vector components
  n = 'p' norm selected

Case C: 3 component matrices of 3-dimensional vectors
  [px, py, pz] = NORMVEC(px, py, pz)
  [px, py, pz] = NORMVEC(px, py, pz, 'p', n)

  px = matrix [M x N x L] of x vector components
  py = matrix [M x N x L] of y vector components
  pz = matrix [M x N x L] of z vector components
  n = 'p' norm selected

Case D: N component matrices of N-dimensional vectors
  [px1, px2, ..., pxN] = NORMVEC(px1, px2, ..., pxN)
  [px1, px2, ..., pxN] = NORMVEC(px1, px2, ..., pxN, 'p', n)

  pxi = matrix [M1 x M2 x ... x MN] of xi vector components
  n = 'p' norm selected

dependency (included)
   vnorm, File Exchange ID = 10708, (c) 2006 by Winston Smith
   http://www.mathworks.com/matlabcentral/fileexchange/10708-vector-norm

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MATLAB 7.14 (R2012a)

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