class_docstr: Class for summing onset evaluations.
class_docstr_tok: ["Class","for","summing","onset","evaluations","."]
docstr: Errors of the true positive detections wrt. the ground truth.
docstr_tok: ["Errors","of","the","true","positive","detections","wrt",".","the","ground","truth","."]
code: def errors(self):
      """Errors of the true positive detections wrt. the ground truth."""
      if not self.eval_objects:
          # return empty array
          return np.zeros(0)
      return np.concatenate([e.errors for e in self.eval_objects])
  
imports: from __future__ import absolute_import, division, print_function
  import numpy
  from .None import Evaluation, MeanEvaluation, SumEvaluation, evaluation_io
  from ..io import load_onsets
  from ..utils import combine_events
label_desc: Use image node_id 1 for calling the OnsetSumEvaluation obj's underlying member method code with example usage: obj.errors() and returns: np, np