public override IOperation Apply()
{
ItemArray <ISymbolicExpressionTree> expressions = SymbolicExpressionTreeParameter.ActualValue;
ResultCollection results = ResultsParameter.ActualValue;
DataTable symbolFrequencies = SymbolFrequenciesParameter.ActualValue;
if (symbolFrequencies == null)
{
symbolFrequencies = new DataTable("Symbol frequencies", "Relative frequency of symbols aggregated over the whole population.");
symbolFrequencies.VisualProperties.YAxisTitle = "Relative Symbol Frequency";
SymbolFrequenciesParameter.ActualValue = symbolFrequencies;
results.Add(new Result("Symbol frequencies", symbolFrequencies));
}
// all rows must have the same number of values so we can just take the first
int numberOfValues = symbolFrequencies.Rows.Select(r => r.Values.Count).DefaultIfEmpty().First();
foreach (var pair in SymbolicExpressionSymbolFrequencyAnalyzer.CalculateSymbolFrequencies(expressions, AggregrateSymbolsWithDifferentSubtreeCount.Value))
{
if (!symbolFrequencies.Rows.ContainsKey(pair.Key))
{
// initialize a new row for the symbol and pad with zeros
DataRow row = new DataRow(pair.Key, "", Enumerable.Repeat(0.0, numberOfValues));
row.VisualProperties.StartIndexZero = true;
symbolFrequencies.Rows.Add(row);
}
symbolFrequencies.Rows[pair.Key].Values.Add(Math.Round(pair.Value, 3));
}
// add a zero for each data row that was not modified in the previous loop
foreach (var row in symbolFrequencies.Rows.Where(r => r.Values.Count != numberOfValues + 1))
{
row.Values.Add(0.0);
}
return(base.Apply());
}
protected SymbolicExpressionSymbolFrequencyAnalyzer(SymbolicExpressionSymbolFrequencyAnalyzer original, Cloner cloner) : base(original, cloner) { }
protected SymbolicExpressionSymbolFrequencyAnalyzer(SymbolicExpressionSymbolFrequencyAnalyzer original, Cloner cloner) : base(original, cloner)
{
}
