parameters: (self, frame=0)
return_statement: return Vec3(xsize, ysize, zsize)*nanometers
docstring: Get the dimensions of the crystallographic unit cell.
  
          Parameters
          ----------
          frame : int=0
              the index of the frame for which to get the unit cell dimensions
docstring_summary: Get the dimensions of the crystallographic unit cell.
docstring_tokens: Get the dimensions of the crystallographic unit cell .
function: def getUnitCellDimensions(self, frame=0):
          """Get the dimensions of the crystallographic unit cell.
  
          Parameters
          ----------
          frame : int=0
              the index of the frame for which to get the unit cell dimensions
          """
          xsize = self._periodicBoxVectors[frame][0][0].value_in_unit(nanometers)
          ysize = self._periodicBoxVectors[frame][1][1].value_in_unit(nanometers)
          zsize = self._periodicBoxVectors[frame][2][2].value_in_unit(nanometers)
          return Vec3(xsize, ysize, zsize)*nanometers
function_tokens: def getUnitCellDimensions ( self , frame = 0 ) : xsize = self . _periodicBoxVectors [ frame ] [ 0 ] [ 0 ] . value_in_unit ( nanometers ) ysize = self . _periodicBoxVectors [ frame ] [ 1 ] [ 1 ] . value_in_unit ( nanometers ) zsize = self . _periodicBoxVectors [ frame ] [ 2 ] [ 2 ] . value_in_unit ( nanometers ) return Vec3 ( xsize , ysize , zsize ) * nanometers