public void ReplaceRow(int row, Vector vec)
{
// Check dimensions:
if (_mColumns != vec.VectorDimension())
throw new Exception("wrong dimension");
for (var i = 0; i < _mColumns; i++)
SetElement(row, i, vec.Elements[i]);
}
public void Subtract(Vector v2)
{
// Check dimensions
if (_nElements != v2.VectorDimension())
throw new Exception("Wrong dimensions");
for (var i = 0; i < _nElements; i++)
Elements[i] = Elements[i] - v2.Elements[i];
}
public static Vector Subtract(Vector v1, Vector v2)
{
// Check dimensions:
if (v1.VectorDimension() != v2.VectorDimension())
throw new Exception("Wrong dimensions");
var resultElements = new double[v1.VectorDimension()];
for (var i = 0; i < v1.VectorDimension(); i++)
resultElements[i] = v1.Elements[i] - v2.Elements[i];
return new Vector(resultElements);
}
public double DotProduct(Vector v2)
{
// Check dimensions
if (_nElements != v2.VectorDimension())
throw new Exception("Wrong dimension");
var result = 0.0;
for (var i = 0; i < _nElements; i++)
result += Elements[i]*v2.Elements[i];
return result;
}
/// <summary>
/// Scalar product double a * Vector v1
/// </summary>
/// <param name="a"></param>
/// <param name="v1"></param>
/// <returns></returns>
public static Vector ScalarProduct(double a, Vector v1)
{
var resultElements = new List<double>();
// Multiply each element of v1 with a
for (var i = 0; i < v1.VectorDimension(); i++)
resultElements.Add(a*v1.Elements[i]);
return new Vector(resultElements);
}
