code: def quant2signal(self, series, iSignal, Q):
      return series.apply(lambda x: iSignal.quantile(x / Q))
  
imports: import pandas
  import numpy
label_desc: Use image node_id 3 for calling the cSignalQuantizer obj's underlying member method code with example usage: obj.quant2signal(series, iSignal, Q) and returns: series