public static TVal[] GetColFromLabel <TRow, TVal>(this LabelledMatrix <TRow, string, TVal> matrix, string label)
{
int labelIndex;
if (!HasCol(matrix, label, out labelIndex))
{
throw new Exception(string.Format("Missing Label : {0}", label));
}
return(matrix.Values.Column(labelIndex));
}
public static bool HasCol <TRow, TVal>(LabelledMatrix <TRow, string, TVal> matrix, string label, out int colIndex)
{
var labelIndexes = matrix.ColLabels
.Select((l, i) => new { Label = l, Index = i })
.Where(data => data.Label.Equals(label, StringComparison.InvariantCultureIgnoreCase))
.Select(data => data.Index)
.ToArray();
if (!labelIndexes.Any())
{
colIndex = -1;
return(false);
}
if (labelIndexes.Count() != 1)
{
throw new Exception(string.Format("Multiple {0} label !", label));
}
colIndex = labelIndexes.First();
return(true);
}
public static TValOut[] GetColFromLabel <TRow, TVal, TValOut>(this LabelledMatrix <TRow, string, TVal> matrix, string label, Func <TVal, TValOut> func)
{
return(matrix.GetColFromLabel(label).Map(func));
}
public static bool HasCol <TRow, TVal>(this LabelledMatrix <TRow, string, TVal> matrix, string label)
{
int index;
return(HasCol(matrix, label, out index));
}