Vec.hpp

// sciplot - a modern C++ scientific plotting library powered by gnuplot
// https://github.com/sciplot/sciplot
//
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
//
// Copyright (c) 2018-2021 Allan Leal
//
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// of this software and associated documentation files (the "Software"), to deal
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#pragma once
 
// C++ includes
#include <algorithm>
#include <functional>
#include <string>
#include <valarray>
#include <vector>
 
namespace sciplot {
 
using Vec = std::valarray<double>;
 
using Strings = std::vector<std::string>;
 
template <typename T0, typename T1, typename U = double>
auto linspace(T0 x0, T1 x1, std::size_t numintervals) -> std::valarray<U>
{
    std::valarray<U> result(numintervals + 1);
    for(std::size_t i = 0; i <= numintervals; ++i)
        result[i] = x0 + i * (x1 - x0) / static_cast<U>(numintervals);
    return result;
}
 
template <typename U = double>
auto range(int x0, int x1) -> Vec
{
    const auto incr = (x1 > x0) ? +1 : -1;
    std::valarray<U> result(x1 - x0 + 1);
    for(std::size_t i = 0; i < result.size(); ++i)
        result[i] = x0 + i * incr;
    return result;
}
 
} // namespace sciplot