== MS_sphere

 MS_SPHERE - Plot a spherical plot of phasevels/anisotropy from a set of 
              elastic constants.

 // Part of MSAT - The Matlab Seismic Anisotropy Toolkit //

 Given an elasticity matrix and density, produce spherical figures showing 
     the P- or S-wave anisotrpy. 

 MS_sphere(CC,rh,mode,...)

 Usage: 
     MS_sphere(CC,rh,mode)                    
         Mode can be 'p'(-wave), 's'(-wave), 's1' (fast s-wave) or 's2'
         (slow s-wave).

     MS_sphere(CC,rh,mode,...)                    
          Further arguments are EVALed. Parameters that can be (re)set 
          are:
            cmap = jet(64) ; colourmap
            icmapflip = 1 ; reverse the sense of the colourscale     
            FSWTickLength=0.08 ; Fast shear wave vector length
            plotlabels = 1 ;
            plotaxes = 1 ;
            nofig = 0 ; suppress the figure command, so plot can be sub-plotted
            nocbar = 0 ; suppress the colorbar
            cax = NaN ; colour axis, define to use - default is auto
            dirs = [] ; directions of interest, this should be a vector of azi, 
                           inc pairs, e.g., [az1 in1 az2 in2 az3 in3 az4 in4]
            dlen = 1.5 ; length of doi vectors 
