/// <summary> Reads a matrix from a reader. The first line in the file should
/// contain the number of rows and columns. Subsequent lines
/// contain elements of the matrix.
///
/// </summary>
/// <param name="r">the reader containing the matrix
/// </param>
/// <throws> Exception if an error occurs </throws>
/// <seealso cref="write(Writer)">
/// </seealso>
/// <author> FracPete, taken from old weka.core.Matrix class
/// </author>
//UPGRADE_ISSUE: Class hierarchy differences between 'java.io.Reader' and 'System.IO.StreamReader' may cause compilation errors. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1186'"
public Matrix(System.IO.StreamReader r)
{
System.IO.StreamReader lnr = new System.IO.StreamReader(r.BaseStream, r.CurrentEncoding);
System.String line;
int currentRow = - 1;
//UPGRADE_WARNING: Method 'java.io.LineNumberReader.readLine' was converted to 'System.IO.StreamReader.ReadLine' which may throw an exception. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1101'"
while ((line = lnr.ReadLine()) != null)
{
// Comments
if (line.StartsWith("%"))
continue;
Tokenizer st = new Tokenizer(line);
// Ignore blank lines
if (!st.HasMoreTokens())
continue;
if (currentRow < 0)
{
int rows = System.Int32.Parse(st.NextToken());
if (!st.HasMoreTokens())
{
//UPGRADE_ISSUE: Method 'java.io.LineNumberReader.getLineNumber' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javaioLineNumberReadergetLineNumber'"
throw new System.Exception("Line " + currentRow + ": expected number of columns");
}
int cols = System.Int32.Parse(st.NextToken());
double[][] tmpArray = new double[rows][];
for (int i = 0; i < rows; i++)
{
tmpArray[i] = new double[cols];
}
A = tmpArray;
m = rows;
n = cols;
currentRow++;
continue;
}
else
{
if (currentRow == RowDimension)
{
//UPGRADE_ISSUE: Method 'java.io.LineNumberReader.getLineNumber' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javaioLineNumberReadergetLineNumber'"
throw new System.Exception("Line " + currentRow + ": too many rows provided");
}
for (int i = 0; i < ColumnDimension; i++)
{
if (!st.HasMoreTokens())
{
//UPGRADE_ISSUE: Method 'java.io.LineNumberReader.getLineNumber' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javaioLineNumberReadergetLineNumber'"
throw new System.Exception("Line " + currentRow + ": too few matrix elements provided");
}
set_Renamed(currentRow, i, System.Double.Parse(st.NextToken()));
}
currentRow++;
}
}
if (currentRow == - 1)
{
//UPGRADE_ISSUE: Method 'java.io.LineNumberReader.getLineNumber' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javaioLineNumberReadergetLineNumber'"
throw new System.Exception("Line " + currentRow + ": expected number of rows");
}
else if (currentRow != RowDimension)
{
//UPGRADE_ISSUE: Method 'java.io.LineNumberReader.getLineNumber' was not converted. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1000_javaioLineNumberReadergetLineNumber'"
throw new System.Exception("Line " + currentRow + ": too few rows provided");
}
}
/// <summary> creates a matrix from the given Matlab string.</summary>
/// <param name="matlab"> the matrix in matlab format
/// </param>
/// <returns> the matrix represented by the given string
/// </returns>
/// <seealso cref="toMatlab()">
/// </seealso>
public static Matrix parseMatlab(System.String matlab)
{
Tokenizer tokRow;
Tokenizer tokCol;
int rows;
int cols;
Matrix result;
System.String cells;
// get content
cells = matlab.Substring(matlab.IndexOf("[") + 1, (matlab.IndexOf("]")) - (matlab.IndexOf("[") + 1)).Trim();
// determine dimenions
tokRow = new Tokenizer(cells, ';');
rows = tokRow.Count;
tokCol = new Tokenizer(tokRow.NextToken(), ' ');
cols = tokCol.Count;
// fill matrix
result = new Matrix(rows, cols);
tokRow = new Tokenizer(cells, ';');
rows = 0;
while (tokRow.HasMoreTokens())
{
tokCol = new Tokenizer(tokRow.NextToken(), ' ');
cols = 0;
while (tokCol.HasMoreTokens())
{
result.set_Renamed(rows, cols, System.Double.Parse(tokCol.NextToken()));
cols++;
}
rows++;
}
return result;
}