MS_ROTRANDOM - Randomly rotate an elasticity matrix.

Generate one or more randomly oriented elasticity matrices given a single
input matrix.

Usage:

[ CC, ... ] = MS_rotRandom( C, ... )

Rotate the elasticity matrix C to a random new orientation. CC is a
6x6 matrix

[ CC, ... ] = MS_rotRandom( C, 'number', n )

CC is a 6x6xn matrix where each orientation is drawn from a uniform
random distribution of orientations such that, for large n, the
avarage of the matricies in CC is isotropic.

[ CC, ... ] = MS_rotRandom( C, 'stream', PRNgenerator )

As above, but allow the user to specify the random number generator
to be used.

[ CC, eulers ] = MS_rotRandom( C, ... )

As above, but also output a 3xn array of Euler angles (Bunge notation
and in degrees) used to generate the rotated elasticity matrices.

See also: MS_ROT3 MS_ROTR MS_ROTEULER