class_docstr: Analyze results of machine learning experiments.
docstr: Return metric by strategy.
docstr_tok: ["Return","metric","by","strategy","."]
code: def metrics_by_strategy(self):
      """Return metric by strategy."""
      self._check_is_evaluated()
      return self._metrics_by_strategy
  
imports: import itertools
  import numpy
  import pandas
  from scipy import stats
  from scipy.stats import ranksums, ttest_ind
  from sktime.benchmarking.base import BaseResults
  from sktime.exceptions import NotEvaluatedError
  from sktime.utils.validation._dependencies import _check_soft_dependencies
label_desc: Use image node_id 4 for calling the Evaluator obj's underlying member method code with example usage: obj.metrics_by_strategy() and returns: self