Function hot

source/matplot/util/colors.cpp:1998–2034

            return result;
        }
        std::vector<std::vector<double>> hot(size_t n) {
            static std::vector<std::vector<double>> map = {
                {0.0416667, 0, 0}, {0.0833333, 0, 0}, {0.125, 0, 0},
                {0.166667, 0, 0},  {0.208333, 0, 0},  {0.25, 0, 0},
                {0.291667, 0, 0},  {0.333333, 0, 0},  {0.375, 0, 0},
                {0.416667, 0, 0},  {0.458333, 0, 0},  {0.5, 0, 0},
                {0.541667, 0, 0},  {0.583333, 0, 0},  {0.625, 0, 0},
                {0.666667, 0, 0},  {0.708333, 0, 0},  {0.75, 0, 0},
                {0.791667, 0, 0},  {0.833333, 0, 0},  {0.875, 0, 0},
                {0.916667, 0, 0},  {0.958333, 0, 0},  {1, 0, 0},
                {1, 0.0416667, 0}, {1, 0.0833333, 0}, {1, 0.125, 0},
                {1, 0.166667, 0},  {1, 0.208333, 0},  {1, 0.25, 0},
                {1, 0.291667, 0},  {1, 0.333333, 0},  {1, 0.375, 0},
                {1, 0.416667, 0},  {1, 0.458333, 0},  {1, 0.5, 0},
                {1, 0.541667, 0},  {1, 0.583333, 0},  {1, 0.625, 0},
                {1, 0.666667, 0},  {1, 0.708333, 0},  {1, 0.75, 0},
                {1, 0.791667, 0},  {1, 0.833333, 0},  {1, 0.875, 0},
                {1, 0.916667, 0},  {1, 0.958333, 0},  {1, 1, 0},
                {1, 1, 0.0625},    {1, 1, 0.125},     {1, 1, 0.1875},
                {1, 1, 0.25},      {1, 1, 0.3125},    {1, 1, 0.375},
                {1, 1, 0.4375},    {1, 1, 0.5},       {1, 1, 0.5625},
                {1, 1, 0.625},     {1, 1, 0.6875},    {1, 1, 0.75},
                {1, 1, 0.8125},    {1, 1, 0.875},     {1, 1, 0.9375},
                {1, 1, 1}};
            if (n == 64) {
                return map;
            }
            std::vector<std::vector<double>> result;
            for (size_t i = 0; i < n; ++i) {
                std::array<float, 4> ac =
                    colormap_interpolation(static_cast<double>(i), 0.,
                                           static_cast<double>(n - 1), map);
                std::vector<double> vc = {ac[1], ac[2], ac[3]};
                result.emplace_back(vc);
            }
            return result;
        }
        std::vector<std::vector<double>> cool(size_t n) {
            static std::vector<std::vector<double>> map = {
                {0, 1, 1},