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fix/optimize floating point precision for file output/info output/json output

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This commit is contained in:
Mario Fink 2021-07-01 12:13:38 +00:00
parent 45efb06aa2
commit 71c9bb7a5c
1 changed files with 42 additions and 12 deletions
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54
lib/imc_channel.hpp
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@ -6,6 +6,7 @@
#include <sstream>
#include "imc_datatype.hpp"
#include "imc_conversion.hpp"
#include <math.h>
//---------------------------------------------------------------------------//
@ -87,27 +88,49 @@ namespace imc
}
};
// adjust stream object
void customize_stream(std::ostream& stout, int prec, bool fixed)
{
if ( fixed )
{
stout<<std::setprecision(prec)<<std::fixed;
}
else
{
stout<<std::setprecision(prec);
}
}
// given a list of numeric objects, join it into a string
template<typename dt>
std::string joinvec(std::vector<dt> myvec, unsigned long int limit = 10)
std::string joinvec(std::vector<dt> myvec, unsigned long int limit = 10, int prec = 10, bool fixed = true)
{
// include entire list for limit = - 1
// include entire list for limit = 0
limit = (limit == 0) ? myvec.size() : limit;
std::stringstream ss;
ss<<"[";
if ( myvec.size() <= limit )
{
for ( dt el: myvec ) ss<<std::setprecision(10)<<el<<",";
for ( dt el: myvec )
{
customize_stream(ss,prec,fixed);
ss<<el<<",";
}
}
else
{
unsigned long int heals = (unsigned long int)(limit/2.);
for ( unsigned long int i = 0; i < heals; i++ ) ss<<myvec[i]<<",";
for ( unsigned long int i = 0; i < heals; i++ )
{
customize_stream(ss,prec,fixed);
ss<<myvec[i]<<",";
}
ss<<"...";
for ( unsigned long int i = myvec.size()-heals; i < myvec.size(); i++ )
{
ss<<std::setprecision(10)<<myvec[i]<<",";
customize_stream(ss,prec,fixed);
ss<<myvec[i]<<",";
}
}
std::string sumstr = ss.str();
@ -133,6 +156,7 @@ namespace imc
std::string yname_, yunit_;
std::string xname_, xunit_;
double xstepwidth_, xoffset_;
int xprec_;
// buffer and data
int signbits_, num_bytes_;
@ -189,6 +213,9 @@ namespace imc
xunit_ = blocks_->at(chnenv_.CDuuid_).get_parameter(prms[5]);
// TODO
// xname_ = std::string("time");
// find appropriate precision for "xdata_" by means of "xstepwidth_"
xprec_ = (xstepwidth_ > 0 ) ? ceil(fabs(log10(xstepwidth_))) : 10;
}
// extract associated CP data
@ -363,8 +390,8 @@ namespace imc
<<std::setw(width)<<std::left<<"offset:"<<offset_<<"\n"
<<std::setw(width)<<std::left<<"group:"<<"("<<group_index_<<","<<group_name_
<<","<<group_comment_<<")"<<"\n"
<<std::setw(width)<<std::left<<"ydata:"<<imc::joinvec<imc::datatype>(ydata_)<<"\n"
<<std::setw(width)<<std::left<<"xdata:"<<imc::joinvec<double>(xdata_)<<"\n";
<<std::setw(width)<<std::left<<"ydata:"<<imc::joinvec<imc::datatype>(ydata_,10,9,true)<<"\n"
<<std::setw(width)<<std::left<<"xdata:"<<imc::joinvec<double>(xdata_,10,xprec_,true)<<"\n";
// <<std::setw(width)<<std::left<<"aff. blocks:"<<chnenv_.get_json()<<"\n";
return ss.str();
}
@ -392,8 +419,8 @@ namespace imc
<<"\",\"comment\":\""<<group_comment_<<"\""<<"}";
if ( include_data )
{
ss<<",\"ydata\":"<<imc::joinvec<imc::datatype>(ydata_,0)
<<",\"xdata\":"<<imc::joinvec<double>(xdata_,0);
ss<<",\"ydata\":"<<imc::joinvec<imc::datatype>(ydata_,0,9,true)
<<",\"xdata\":"<<imc::joinvec<double>(xdata_,0,xprec_,true);
}
// ss<<"\",\"aff. blocks\":\""<<chnenv_.get_json()
ss<<"}";
@ -402,7 +429,7 @@ namespace imc
}
// print channel
void print(std::string filename, const char sep = ',', int width = 25)
void print(std::string filename, const char sep = ',', int width = 25, int yprec = 9)
{
std::ofstream fou(filename);
@ -423,13 +450,16 @@ namespace imc
{
if ( sep == ' ' )
{
fou<<std::setprecision(9)<<std::fixed
fou<<std::setprecision(xprec_)<<std::fixed
<<std::setw(width)<<std::left<<xdata_[i]
<<std::setprecision(yprec)<<std::fixed
<<std::setw(width)<<std::left<<ydata_[i]<<"\n";
}
else
{
fou<<xdata_[i]<<sep<<ydata_[i]<<"\n";
fou<<std::setprecision(xprec_)<<std::fixed<<xdata_[i]
<<sep
<<std::setprecision(yprec)<<std::fixed<<ydata_[i]<<"\n";
}
}