class_docstr: number of zero crossings among two consecutive samples above a certain threshold for each
  variable in the segmented time series
class_docstr_tok: ["number","of","zero","crossings","among","two","consecutive","samples","above","a","certain","threshold","for","each","variable","in","the","segmented","time","series"]
code: def __repr__(self):
      return "%s(threshold=%s)" % (
          self.__class__.__name__,
          self.threshold,
      )
  
imports: import numpy
  from scipy import stats
label_desc: Use image node_id 3 for calling the zero_crossing obj's underlying member method code with example usage: obj.__repr__() and returns: unknown