code: def sawtooth(t, width=1.0):
      """
      Return a periodic sawtooth or triangle waveform.
  
      The sawtooth waveform has a period ``2*pi``, rises from -1 to 1 on the
      interval 0 to ``width*2*pi``, then drops from 1 to -1 on the interval
      ``width*2*pi`` to ``2*pi``. `width` must be in the interval [0, 1].
  
      Note that this is not band-limited.  It produces an infinite number
      of harmonics, which are aliased back and forth across the frequency
      spectrum.
  
      Parameters
      ----------
      t : array_like
          Time.
      width : array_like, optional
          Width of the rising ramp as a proportion of the total cycle.
          Default is 1, producing a rising ramp, while 0 produces a falling
          ramp.  `width` = 0.5 produces a triangle wave.
          If an array, causes wave shape to change over time, and must be the
          same length as t.
  
      Returns
      -------
      y : ndarray
          Output array containing the sawtooth waveform.
  
      Examples
      --------
      A 5 Hz waveform sampled at 500 Hz for 1 second:
  
      >>> from cupyx.scipy import signal
      >>> import matplotlib.pyplot as plt
      >>> t = np.linspace(0, 1, 500)
      >>> plt.plot(t, signal.sawtooth(2 * np.pi * 5 * t))
      """
      t, w = cupy.asarray(t), cupy.asarray(width)
      y = _sawtooth_kernel(t, w)
      return y
  
file_path: cupy/cupyx/scipy/signal/_waveforms.py
imports: import cupy
  from cupy._core._scalar import get_typename
  from cupy_backends.cuda.api import runtime
  import numpy
label_desc: Use image node_id 3 for calling a global function with example usage: sawtooth(t, width) and returns: y