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[r108]: / trunk / include / dgsmatrix- / dgsmatrix-calc.hpp  Maximize  Restore  History

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//=============================================================================
/*! return transposed dgsmatrix */
inline _dgsmatrix t(const dgsmatrix& mat)
{
#ifdef CPPL_VERBOSE
std::cerr << "# [MARK] t(const dgsmatrix&)" << std::endl;
#endif//CPPL_VERBOSE
dgsmatrix newmat(mat);
for(std::vector<dcomponent>::iterator it=newmat.Data.begin(); it!=newmat.Data.end(); it++){
std::swap(it->i,it->j);
}
std::swap(newmat.Rows,newmat.Cols);
return _(newmat);
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
//=============================================================================
/*! search the index of element having the largest absolute value
in 0-based numbering system */
inline void idamax(long& i, long& j, const dgsmatrix& mat)
{
#ifdef CPPL_VERBOSE
std::cerr << "# [MARK] idamax(long&, long&, const dgsmatrix&)" << std::endl;
#endif//CPPL_VERBOSE
std::vector<dcomponent>::const_iterator itx(mat.Data.begin());
double vmax(0);
for(std::vector<dcomponent>::const_iterator it=mat.Data.begin(); it!=mat.Data.end(); it++){
if(vmax < it->v){
vmax=fabs(it->v);
itx=it;
}
}
i=itx->i;
j=itx->j;
}
//=============================================================================
/*! return its largest absolute value */
inline double damax(const dgsmatrix& mat)
{
#ifdef CPPL_VERBOSE
std::cerr << "# [MARK] damax(const dgsmatrix&)" << std::endl;
#endif//CPPL_VERBOSE
std::vector<dcomponent>::const_iterator itx(mat.Data.begin());
double vmax(0);
for(std::vector<dcomponent>::const_iterator it=mat.Data.begin(); it!=mat.Data.end(); it++){
if(vmax < it->v){
vmax=fabs(it->v);
itx=it;
}
}
return itx->v;
}
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