docs: def _populateHistogram(self):
          """Call the C-code that actually populates the histogram"""
          try :
              buildHistogram.populate1DHist(self._data, self.histogram,
                  self.minValue, self.maxValue, self.binWidth)
          except:
              if ((self._data.max() - self._data.min()) < self.binWidth):
                  raise ValueError("In histogram1d class, the binWidth is "
                                   "greater than the data range of the array "
                                   "object.")
              else:
                  raise SystemError("An error processing the array object "
                                    "information occured in the buildHistogram "
                                    "module of histogram1d.")