heatmap.cpp

#include <vector>
#include <plotpp.hpp>
#include <cmath>

double sinc(double x){
    if(x == 0.0){
        return 1.0;
    }else{
        return std::sin(x)/x;
    }
}

int main() {
    using namespace plotpp;

    // construct heatmap from 2D array (alternatively matrix-types work too)
    const size_t rows = 16;
    const size_t columns = 25;
    double array[rows][columns] = {};

    for(size_t r = 0; r < rows; r++){
        for(size_t c = 0; c < columns; c++){
            double x = r + 0.5 - rows/2;
            double y = c + 0.5 - columns/2;
            array[r][c] = sinc(std::sqrt(x*x + y*y));
        }
    }

    Figure fig("Heatmap");
    fig.add(heatmap(&array));
    fig.ylim(0, rows-1);
    fig.xlim(0, columns-1);
    fig.show();
    fig.save("headmap-plot.svg");

    return 0;
}

Filename: heatmap.cpp

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Updated on 2025-03-11 at 16:08:10 +0100