docstr: Sum of Squared Error over non-missing numeric entries, or None if not present.
docstr_tok: ["Sum","of","Squared","Error","over","non-missing","numeric","entries",",","or","None","if","not","present","."]
code: def num_err(self):
      """Sum of Squared Error over non-missing numeric entries, or None if not present."""
      if MetricsBase._has(self._metric_json, "numerr"):
          return self._metric_json["numerr"]
      return None
  
imports: from h2o.model import MetricsBase
label_desc: Use image node_id 2 for calling the H2ODimReductionModelMetrics obj's underlying member method code with example usage: obj.num_err() and returns: None, self