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float support for polynomial

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jiri committed 2026-11-05 16:59:52 +01:00
1 parent d11e7515de
commit 0751cff8b8
2 files changed
+7 -2
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polynomial.cc
+5
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@@ -264,6 +264,8 @@ template class Polynomial<int>;
template class Polynomial<unsigned int>;
template class Polynomial<double>;
template class Polynomial<std::complex<double> >;
template class Polynomial<float>;
template class Polynomial<std::complex<float> >;
#define INSTANTIZE(T) \
template NRMat<T> Sylvester(const Polynomial<T> &p, const Polynomial<T> &q); \
@@ -277,12 +279,15 @@ INSTANTIZE(int)
INSTANTIZE(unsigned int)
INSTANTIZE(double)
INSTANTIZE(std::complex<double>)
INSTANTIZE(float)
INSTANTIZE(std::complex<float>)
#define INSTANTIZE2(T) \
template Polynomial<T> hermite_polynomial(int); \
INSTANTIZE2(int)
INSTANTIZE2(double)
INSTANTIZE2(float)
polynomial.h
+2 -2
View File
@@ -86,7 +86,7 @@ public:
while(n>0 && MYABS((*this)[n])<=thr) --n;
resize(n,true);
};
void normalize() {if((*this)[degree()]==(T)0) laerror("zero coefficient at highest degree - simplify first"); *this /= (*this)[degree()];};
void normalize() {const T lead=((const Polynomial &)*this)[degree()]; if(lead==(T)0) laerror("zero coefficient at highest degree - simplify first"); *this /= lead;};
Polynomial shifted(const int shift) const
{
if(shift==0) return *this;
@@ -154,7 +154,7 @@ public:
Polynomial operator/(const Polynomial &rhs) const {Polynomial q,r; polydiv(rhs,q,r); return q;};
Polynomial operator%(const Polynomial &rhs) const {Polynomial q,r; polydiv(rhs,q,r); return r;};
NRMat<T> companion() const; //matrix which has this characteristic polynomial
NRVec<typename LA_traits<T>::complextype> roots() const; //implemented for complex<double> and double only
NRVec<typename LA_traits<T>::complextype> roots() const; //implemented for double, float and their complex types only
NRVec<T> realroots(const typename LA_traits<T>::normtype thr) const;
T newton(const T x0, const typename LA_traits<T>::normtype thr=LA_precision<typename LA_traits<T>::normtype>::newton_threshold(), const int maxit=1000) const; //solve root from the guess
Polynomial pow(const int i) const; //integer power