text: #include <cmath>
  #include <matplot/matplot.h>
  
  int main() {
      using namespace matplot;
      auto [X,Y] = meshgrid(iota(1,.5,10),iota(1,20));
      auto Z = transform(X, Y, [](double x, double y) {
          return sin(x) + cos(y);
      });
      auto s = surfc(X,Y,Z);
  
      wait();
      return 0;
  }