code: def sinc(x, **kwargs):
      r"""
      Return the sinc function.
  
      The sinc function is :math:`\\sin(\\pi x)/(\\pi x)`.
  
      Parameters
      ----------
      x : Tensor
          Tensor (possibly multi-dimensional) of values for which to to
          calculate ``sinc(x)``.
  
      Returns
      -------
      out : Tensor
          ``sinc(x)``, which has the same shape as the input.
  
      Notes
      -----
      ``sinc(0)`` is the limit value 1.
  
      The name sinc is short for "sine cardinal" or "sinus cardinalis".
  
      The sinc function is used in various signal processing applications,
      including in anti-aliasing, in the construction of a Lanczos resampling
      filter, and in interpolation.
  
      For bandlimited interpolation of discrete-time signals, the ideal
      interpolation kernel is proportional to the sinc function.
  
      References
      ----------
      .. [1] Weisstein, Eric W. "Sinc Function." From MathWorld--A Wolfram Web
             Resource. http://mathworld.wolfram.com/SincFunction.html
      .. [2] Wikipedia, "Sinc function",
             http://en.wikipedia.org/wiki/Sinc_function
  
      Examples
      --------
      >>> import mars.tensor as mt
  
      >>> x = mt.linspace(-4, 4, 41)
      >>> mt.sinc(x).execute()
      array([ -3.89804309e-17,  -4.92362781e-02,  -8.40918587e-02,
              -8.90384387e-02,  -5.84680802e-02,   3.89804309e-17,
               6.68206631e-02,   1.16434881e-01,   1.26137788e-01,
               8.50444803e-02,  -3.89804309e-17,  -1.03943254e-01,
              -1.89206682e-01,  -2.16236208e-01,  -1.55914881e-01,
               3.89804309e-17,   2.33872321e-01,   5.04551152e-01,
               7.56826729e-01,   9.35489284e-01,   1.00000000e+00,
               9.35489284e-01,   7.56826729e-01,   5.04551152e-01,
               2.33872321e-01,   3.89804309e-17,  -1.55914881e-01,
              -2.16236208e-01,  -1.89206682e-01,  -1.03943254e-01,
              -3.89804309e-17,   8.50444803e-02,   1.26137788e-01,
               1.16434881e-01,   6.68206631e-02,   3.89804309e-17,
              -5.84680802e-02,  -8.90384387e-02,  -8.40918587e-02,
              -4.92362781e-02,  -3.89804309e-17])
  
      >>> import matplotlib.pyplot as plt
      >>> plt.plot(x.execute(), np.sinc(x).execute())
      [<matplotlib.lines.Line2D object at 0x...>]
      >>> plt.title("Sinc Function")
      <matplotlib.text.Text object at 0x...>
      >>> plt.ylabel("Amplitude")
      <matplotlib.text.Text object at 0x...>
      >>> plt.xlabel("X")
      <matplotlib.text.Text object at 0x...>
      >>> plt.show()
      """
      op = TensorSinc(**kwargs)
      return op(x)
  
file_path: mars/mars/tensor/arithmetic/sinc.py
imports: import numpy
  from ...None import opcodes
  from ..utils import infer_dtype
  from .core import TensorUnaryOp
  from .utils import arithmetic_operand
label_desc: Use image node_id 1 for calling a global function with example usage: sinc(x) and returns: op