/// <summary>
/// Subtracts two matrices. This operation can only be performed if the matrices are of the same type and dimensions. </summary>
/// <param name="m1"> The first matrix, not null </param>
/// <param name="m2"> The second matrix, not null </param>
/// <returns> The second matrix subtracted from the first </returns>
/// <exception cref="IllegalArgumentException"> If the matrices are not of the same type, if the matrices are not the same shape. </exception>
public virtual Matrix subtract(Matrix m1, Matrix m2)
{
ArgChecker.notNull(m1, "m1");
ArgChecker.notNull(m2, "m2");
if (m1 is DoubleArray)
{
if (m2 is DoubleArray)
{
DoubleArray array1 = (DoubleArray)m1;
DoubleArray array2 = (DoubleArray)m2;
return(array1.minus(array2));
}
throw new System.ArgumentException("Tried to subtract a " + m1.GetType() + " and " + m2.GetType());
}
else if (m1 is DoubleMatrix)
{
if (m2 is DoubleMatrix)
{
DoubleMatrix matrix1 = (DoubleMatrix)m1;
DoubleMatrix matrix2 = (DoubleMatrix)m2;
return(matrix1.minus(matrix2));
}
throw new System.ArgumentException("Tried to subtract a " + m1.GetType() + " and " + m2.GetType());
}
throw new System.NotSupportedException();
}