code: def sinegauss(t, t0, f0, Q):
      """Sine-gaussian wavelet"""
      a = (f0 * 1.0 / Q) ** 2
      return np.exp(-a * (t - t0) ** 2) * np.exp(
          2j * np.pi * f0 * (t - t0)
      )
  
file_path: astroML/astroML/fourier.py
imports: import numpy
label_desc: Use image node_id 4 for calling a global function with example usage: sinegauss(t, t0, f0, Q) and returns: unknown