public void SquareMatrixAccess()
{
double[] x = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
SquareMatrix V = CreateVandermondeMatrix(x);
// check nullity
Assert.IsTrue(V != null);
// check dimension
Assert.IsTrue(V.Dimension == x.Length);
// check column
ColumnVector c = V.Column(1);
Assert.IsTrue(c.Dimension == x.Length);
for (int i = 0; i < c.Dimension; i++)
{
Assert.IsTrue(c[i] == V[i, 1]);
Assert.IsTrue(c[i] == x[i]);
}
// check row
RowVector r = V.Row(0);
Assert.IsTrue(r.Dimension == x.Length);
for (int i = 0; i < r.Dimension; i++)
{
Assert.IsTrue(r[i] == V[0, i]);
Assert.IsTrue(r[i] == 1.0);
}
// check clone
SquareMatrix VC = V.Copy();
Assert.IsTrue(VC == V);
Assert.IsFalse(VC != V);
// check independence of clone
VC[0, 0] += 1.0;
Assert.IsFalse(VC == V);
Assert.IsTrue(VC != V);
}