"> AMAC  Calculate Modal Assurance Critera matrix M from two mode sets

       M = amac(V1,V2)

       M           MAC matrix

       V1          First mode shape matrix with modes in columns
       V2          Second mode shape matrix (optional)

 M = amac(V1)      produces an auto MAC (V1 vs. V1 shapes)
 M = amac(V1,V2)   produces a cross MAC

 The number of modes do not need to be the same, but the number of rows in
 both matrices (DOFs) must (of course) be the same</pre></div>

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