public static Matrix map(Matrix m, LambdaExpression mapper, VariableContext vc)
{
ExpressionEvaluator evaluator = new MathyLanguageService().CreateEvaluator();
List <List <double> > result = new List <List <double> >();
double[] row = new double[m.ColumnCount];
for (int i = 0; i <= m.RowCount - 1; i++)
{
for (int j = 0; j <= m.ColumnCount - 1; j++)
{
row[j] = m[i, j];
}
vc.Set(mapper.VariableNames[0], row.Where(c => !double.IsNaN(c)).ToArray());
if (mapper.VariableNames.Length > 1)
{
vc.Set(mapper.VariableNames[1], i);
}
double[] mappedRow;
var obj = evaluator.Evaluate(mapper.Body, vc);
try
{
mappedRow = (double[])obj;
}
catch (Exception ex)
{
var a = (object[])obj;
mappedRow = (double[])a[0];
}
result.Add(new List <double>());
for (int j = 0; j <= mappedRow.Length - 1; j++)
{
result[i].Add(mappedRow[j]);
}
}
vc.Remove(mapper.VariableNames[0]);
List <double> cells = new List <double>();
foreach (List <double> resultRow in result)
{
foreach (double cell in resultRow)
{
cells.Add(cell);
}
}
return(new Matrix(m.RowCount, result[0].Count, cells.ToArray()));
}
private static object[] map(object[] items, LambdaExpression mapper, VariableContext vc)
{
ExpressionEvaluator evaluator = new MathyLanguageService().CreateEvaluator();
object[] result = new object[items.Length];
for (int i = 0; i <= items.Length - 1; i++)
{
vc.Set(mapper.VariableNames[0], items[i]);
result[i] = evaluator.Evaluate(mapper.Body, vc);
}
vc.Remove(mapper.VariableNames[0]);
return(result);
}
