private Dictionary <Tuple <T1, T2>, int> CollectKeys2 <T1, T2>()
{
Debug.Assert(_keyColumns.Length == 2);
var column1 = _dataMap[_keyColumns[0]].UnderlyingList;
var column2 = _dataMap[_keyColumns[1]].UnderlyingList;
var rowCount = _dataMap.MaxRowCount;
var result = new Dictionary <Tuple <T1, T2>, int>(rowCount);
for (var i = 0; i < rowCount; ++i)
{
T1 k1 = i >= column1.Count ? TypeTrait <T1> .GetNaN() : (T1)column1[i];
T2 k2 = i >= column2.Count ? TypeTrait <T2> .GetNaN() : (T2)column2[i];
var key = Tuple.Create(k1, k2);
try
{
result.Add(key, i);
}
catch (ArgumentException ex)
{
throw new ArgumentException($"Duplicate key values: {key}", ex);
}
}
return(result);
}
public static DataMap FromJagged <T>(T[][] source, string[] columnNames = null, bool transpose = false, IEqualityComparer <string> keyComparaer = null)
{
var result = new DataMap(keyComparaer);
if (!transpose)
{
if (columnNames == null)
{
var c = source[0].Length;
columnNames = new string[c];
for (var i = 0; i < c; ++i)
{
columnNames[i] = "Column" + i;
}
}
for (var i = 0; i < columnNames.Length; ++i)
{
var data = new List <T>(source.Length);
result.Add(columnNames[i], data);
for (var j = 0; j < source.Length; ++j)
{
var row = source[j];
if (i < row.Length)
{
data.Add(row[i]);
}
else
{
data.Add(TypeTrait <T> .GetNaN());
}
}
}
}
else
{
if (columnNames == null)
{
var c = source.Length;
columnNames = new string[c];
for (var i = 0; i < c; ++i)
{
columnNames[i] = "Column" + i;
}
}
for (var i = 0; i < columnNames.Length; ++i)
{
result.Add(columnNames[i], source[i]);
}
}
return(result);
}
private Dictionary <T1, int> CollectKeys1 <T1>()
{
Debug.Assert(_keyColumns.Length == 1);
var column1 = _dataMap[_keyColumns[0]].UnderlyingList;
var rowCount = _dataMap.MaxRowCount;
var result = new Dictionary <T1, int>(rowCount);
for (var i = 0; i < rowCount; ++i)
{
T1 k1 = i >= column1.Count ? TypeTrait <T1> .GetNaN() : (T1)column1[i];
result.Add(k1, i);
}
return(result);
}
private Dictionary <Tuple <T1, T2, T3, T4, T5, T6>, int> CollectKeys6 <T1, T2, T3, T4, T5, T6>()
{
Debug.Assert(_keyColumns.Length == 6);
var column1 = _dataMap[_keyColumns[0]].UnderlyingList;
var column2 = _dataMap[_keyColumns[1]].UnderlyingList;
var column3 = _dataMap[_keyColumns[2]].UnderlyingList;
var column4 = _dataMap[_keyColumns[3]].UnderlyingList;
var column5 = _dataMap[_keyColumns[4]].UnderlyingList;
var column6 = _dataMap[_keyColumns[5]].UnderlyingList;
var rowCount = _dataMap.MaxRowCount;
var result = new Dictionary <Tuple <T1, T2, T3, T4, T5, T6>, int>(rowCount);
for (var i = 0; i < rowCount; ++i)
{
T1 k1 = i >= column1.Count ? TypeTrait <T1> .GetNaN() : (T1)column1[i];
T2 k2 = i >= column2.Count ? TypeTrait <T2> .GetNaN() : (T2)column2[i];
T3 k3 = i >= column3.Count ? TypeTrait <T3> .GetNaN() : (T3)column3[i];
T4 k4 = i >= column4.Count ? TypeTrait <T4> .GetNaN() : (T4)column4[i];
T5 k5 = i >= column5.Count ? TypeTrait <T5> .GetNaN() : (T5)column5[i];
T6 k6 = i >= column6.Count ? TypeTrait <T6> .GetNaN() : (T6)column6[i];
var key = Tuple.Create(k1, k2, k3, k4, k5, k6);
try
{
result.Add(key, i);
}
catch (ArgumentException ex)
{
throw new ArgumentException($"Duplicate key values: {key}", ex);
}
}
return(result);
}
public static MetaNum Sum(this IList <MetaNum> self, bool skipNaN = true, int minCount = 0)
{
MetaNum sum = (MetaNum)0.0;
int count = 0;
foreach (var value in self)
{
if (skipNaN && TypeTrait <MetaNum> .IsNaN(value))
{
continue;
}
sum += value;
++count;
}
if (count < minCount)
{
return(TypeTrait <MetaNum> .GetNaN());
}
return(sum);
}
public static MetaNum Product(this IList <MetaNum> self, bool skipNaN = true, int minCount = 0)
{
MetaNum product = (MetaNum)1;
int count = 0;
foreach (var value in self)
{
if (skipNaN && TypeTrait <MetaNum> .IsNaN(value))
{
continue;
}
product *= value;
++count;
}
if (count < minCount)
{
return(TypeTrait <MetaNum> .GetNaN());
}
return(product);
}