class_docstr: The class used to define vectors.
  
  It along with ReferenceFrame are the building blocks of describing a
  classical mechanics system in PyDy and sympy.physics.vector.
  
  Attributes
  ==========
  
  simp : Boolean
      Let certain methods use trigsimp on their outputs
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docstr: Substitution on the Vector.
  
  Examples
  ========
  
  >>> from sympy.physics.vector import ReferenceFrame
  >>> from sympy import Symbol
  >>> N = ReferenceFrame('N')
  >>> s = Symbol('s')
  >>> a = N.x * s
  >>> a.subs({s: 2})
  2*N.x
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code: def subs(self, *args, **kwargs):
      """Substitution on the Vector.
  
      Examples
      ========
  
      >>> from sympy.physics.vector import ReferenceFrame
      >>> from sympy import Symbol
      >>> N = ReferenceFrame('N')
      >>> s = Symbol('s')
      >>> a = N.x * s
      >>> a.subs({s: 2})
      2*N.x
  
      """
  
      d = {}
      for v in self.args:
          d[v[1]] = v[0].subs(*args, **kwargs)
      return Vector(d)
  
imports: from sympy import S, sympify, expand, sqrt, Add, zeros, acos, ImmutableMatrix, simplify
  from sympy.simplify.trigsimp import trigsimp
  from sympy.printing.defaults import Printable
  from sympy.utilities.misc import filldedent
  from sympy.core.evalf import EvalfMixin
  from mpmath.libmp.libmpf import prec_to_dps
label_desc: Use image node_id 28 for calling the Vector obj's underlying member method code with example usage: obj.subs() and returns: Vector