/// <summary>
/// Parses multiline text input from a textreader into a Matrix where each line
/// corresponsd to a row and the items on the line are space deliminted
/// </summary>
/// <param name="reader">The TextReader</param>
/// <returns>The Matrix</returns>
public static Matrix3d Load(this Matrix3d mat, TextReader reader)
{
List <double[]> rows = new List <double[]>();
Regex rx = new Regex(@"\s+");
while (reader.Peek() != -1)
{
string line = reader.ReadLine().Trim();
if (line != "")
{
string[] rowStrs = rx.Split(line);
double[] matrixRow = new double[rowStrs.Length];
for (int i = 0; i < rowStrs.Length; i++)
{
double val = 0;
if (double.TryParse(rowStrs[i], out val))
{
matrixRow[i] = val;
}
else
{
throw new ArgumentException("Invalid string");
}
}
rows.Add(matrixRow);
}
}
if (rows.Count > 1)
{
//Check that all rows have the same length
int rowSize = rows[0].Length;
for (int i = 1; i < rows.Count; i++)
{
if (rows[i].Length != rowSize)
{
throw new ArgumentException("Rows of inconsistant length");
}
}
mat = mat.FromRowsList(rows);
return(mat);
}
else if (rows.Count == 1)
{
mat = mat.FromRowsList(rows);
return(mat);
}
else
{
return(mat);
}
}
