template <class T>
inline T max (const T &x1, const T &x2)
{
return (x1 >= x2) ? x1 : (x2 < x1) ? x2 : 0;
}
template <class T>
inline T min (const T &x1, const T &x2)
{
return (x1 <= x2) ? x1 : (x2 > x1) ? x2 : 0;
}
inline Matrix
ones (const int r = 1, const int c = 1)
{
Matrix m (r, c, 1.0);
return m;
}
inline ColumnVector
nozeros (const ColumnVector v0, const double tol = 0.0)
{
ColumnVector v (v0.length ());
register int i, j;
for (i = j = 0; i < v.length (); i++)
if (tol < abs (v0 (i)))
{
v (j) = v0 (i);
j++;
}
if (0 == j)
{
return *new ColumnVector ();
}
else
{
return (v.extract (0, --j));
}
}
inline ColumnVector
zeros (const int r)
{
ColumnVector v (r, 0.0);
return v;
}
inline Matrix
zeros (const int r, const int c)
{
Matrix m (r, c, 0.0);
return m;
}
template <class T>
inline int
sign (T x)
{
return
(0 < x) ? +1 :
(0 > x) ? -1 :
0;
}