  COMMAND PWAVE1D
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    Purpose: transversal/longitudinal particle-wave along x-axis
      Usage: PWAVE1D(<particleID>,<frames>,<filename>,<"T" or "L">,<saveFormat>,
                     [<amplitude>,<wavelength>,<source>,<damping>,
                     <phase in degrees>])
   Examples: pwave1d(1,40,obj,t,obj,12.0,24,0,1.0,0.0)
             pwave1d(1,33,ram:ob,t,particle)
             pwave1d(1,33,ram:ob,l,obj)
