code: def predict(self, x):
      return sigmoid(x, *self.popt)
  
file_path: scattertext/scattertext/smoothing/sigmoidal.py
imports: import numpy
  from scipy.optimize import curve_fit
label_desc: Use image node_id 4 for calling the Sigmoidal obj's underlying member method code with example usage: obj.predict(x) and returns: sigmoid