mirror of
https://github.com/aportelli/LatAnalyze.git
synced 2024-11-10 08:55:37 +00:00
88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/*
|
|
* TabFunction.cpp, part of LatAnalyze 3
|
|
*
|
|
* Copyright (C) 2013 - 2014 Antonin Portelli
|
|
*
|
|
* LatAnalyze 3 is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* LatAnalyze 3 is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with LatAnalyze 3. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <LatAnalyze/TabFunction.hpp>
|
|
#include <LatAnalyze/includes.hpp>
|
|
|
|
using namespace std;
|
|
using namespace Latan;
|
|
|
|
/******************************************************************************
|
|
* TabFunction implementation *
|
|
******************************************************************************/
|
|
// constructors ////////////////////////////////////////////////////////////////
|
|
TabFunction::TabFunction(void)
|
|
: DoubleFunction(1)
|
|
{}
|
|
|
|
TabFunction::TabFunction(const DVec &x, const DVec &y)
|
|
: TabFunction()
|
|
{
|
|
setData(x, y);
|
|
}
|
|
|
|
TabFunction::TabFunction(const XYStatData &data, const Index i, const Index j)
|
|
: TabFunction()
|
|
{
|
|
setData(data, i, j);
|
|
}
|
|
|
|
// access //////////////////////////////////////////////////////////////////////
|
|
void TabFunction::setData(const DVec &x, const DVec &y)
|
|
{
|
|
if (x.size() != y.size())
|
|
{
|
|
LATAN_ERROR(Size, "tabulated function x/y data size mismatch");
|
|
}
|
|
FOR_VEC(x, i)
|
|
{
|
|
value_[x(i)] = y(i);
|
|
}
|
|
}
|
|
|
|
void TabFunction::setData(const XYStatData &data, const Index i, const Index j)
|
|
{
|
|
setData(data.x(i), data.y(j));
|
|
}
|
|
|
|
// function call ///////////////////////////////////////////////////////////////
|
|
double TabFunction::operator()(const double *arg) const
|
|
{
|
|
double x = arg[0], x_a, x_b, y_a, y_b;
|
|
|
|
if ((x < value_.begin()->first)||(x >= value_.rbegin()->first))
|
|
{
|
|
LATAN_ERROR(Range, "tabulated function variable out of range (x= "
|
|
+ strFrom(x) + " not in ["
|
|
+ strFrom(value_.begin()->first) + ", "
|
|
+ strFrom(value_.rbegin()->first) + "])");
|
|
}
|
|
|
|
auto i = value_.equal_range(x);
|
|
auto low = (x == i.first->first) ? i.first : prev(i.first);
|
|
auto high = i.second;
|
|
|
|
x_a = low->first;
|
|
x_b = high->first;
|
|
y_a = low->second;
|
|
y_b = high->second;
|
|
|
|
return y_a + (x - x_a)*(y_b - y_a)/(x_b - x_a);
|
|
}
|