public DMatrixRBlock(int numRows, int numCols, int blockLength)
{
UtilEjml.checkTooLarge(numRows, numCols);
this.data = new double[numRows * numCols];
this.blockLength = blockLength;
this.numRows = numRows;
this.numCols = numCols;
}
/// <summary>
/// Creates a new Matrix with the specified shape whose elements initially
/// have the value of zero.
/// </summary>
/// <param name="numRows"> The number of rows in the matrix. </param>
/// <param name="numCols"> The number of columns in the matrix. </param>
//JAVA TO C# CONVERTER WARNING: The following constructor is declared outside of its associated class:
//ORIGINAL LINE: public DMatrixRMaj(int numRows, int numCols)
public DMatrixRMaj(int numRows, int numCols)
{
UtilEjml.checkTooLarge(numRows, numCols);
data = new double[numRows * numCols];
this.numRows = numRows;
this.numCols = numCols;
}
/// <summary>
/// Creates a new DMatrixRMaj around the provided data. The data must encode
/// a row-major matrix. Any modification to the returned matrix will modify the
/// provided data.
/// </summary>
/// <param name="numRows"> Number of rows in the matrix. </param>
/// <param name="numCols"> Number of columns in the matrix. </param>
/// <param name="data"> Data that is being wrapped. Referenced Saved. </param>
/// <returns> A matrix which references the provided data internally. </returns>
public static DMatrixRMaj wrap(int numRows, int numCols, double[] data)
{
UtilEjml.checkTooLarge(numRows, numCols);
DMatrixRMaj s = new DMatrixRMaj();
s.data = data;
s.numRows = numRows;
s.numCols = numCols;
return(s);
}
/// <summary>
/// <para>
/// Creates a new matrix which has the same value as the matrix encoded in the
/// provided array. The input matrix's format can either be row-major or
/// column-major.
/// </para>
///
/// <para>
/// Note that 'data' is a variable argument type, so either 1D arrays or a set of numbers can be
/// passed in:<br>
/// DenseMatrix a = new DenseMatrix(2,2,true,new double[]{1,2,3,4});<br>
/// DenseMatrix b = new DenseMatrix(2,2,true,1,2,3,4);<br>
/// <br>
/// Both are equivalent.
/// </para>
/// </summary>
/// <param name="numRows"> The number of rows. </param>
/// <param name="numCols"> The number of columns. </param>
/// <param name="rowMajor"> If the array is encoded in a row-major or a column-major format. </param>
/// <param name="data"> The formatted 1D array. Not modified. </param>
public DMatrixRMaj(int numRows, int numCols, bool rowMajor, params double[] data)
{
UtilEjml.checkTooLarge(numRows, numCols);
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int length = numRows * numCols;
int length = numRows * numCols;
this.data = new double[length];
this.numRows = numRows;
this.numCols = numCols;
set(numRows, numCols, rowMajor, data);
}
public override void reshape(int numRows, int numCols, bool saveValues)
{
UtilEjml.checkTooLarge(numRows, numCols);
if (data.Count() < numRows * numCols)
{
double[] d = new double[numRows * numCols];
if (saveValues)
{
Array.Copy(data, 0, d, 0, NumElements);
}
this.data = d;
}
this.numRows = numRows;
this.numCols = numCols;
}
public override void reshape(int numRows, int numCols, bool saveValues)
{
UtilEjml.checkTooLarge(numRows, numCols);
if (numRows * numCols <= data.Count())
{
this.numRows = numRows;
this.numCols = numCols;
}
else
{
double[] data = new double[numRows * numCols];
if (saveValues)
{
System.Array.Copy(this.data, 0, data, 0, NumElements);
}
this.numRows = numRows;
this.numCols = numCols;
this.data = data;
}
}
public static DMatrixRMaj convert(double[][] src, DMatrixRMaj?dst)
{
int rows = src.Count();
if (rows == 0)
{
throw new ArgumentException("Rows of src can't be zero");
}
int cols = src[0].Count();
UtilEjml.checkTooLarge(rows, cols);
if (dst == null)
{
dst = new DMatrixRMaj(rows, cols);
}
else
{
dst.reshape(rows, cols);
}
int pos = 0;
for (int i = 0; i < rows; i++)
{
double[] row = src[i];
if (row.Count() != cols)
{
throw new ArgumentException("All rows must have the same length");
}
System.Array.Copy(row, 0, dst.data, pos, cols);
pos += cols;
}
return(dst);
}
