read_csv, as_dates example

main.cpp

#include <iostream>

#include "data_frame.h"
#include "read_csv.h"
#include "head.h"
#include "as_dates.h"

using namespace R;

int main() {

	std::cout << "read dumb data into heterogeneous container\n\n";

	auto car_data = read_csv("mpg.csv");

	try {
		car_data["year"] = as_dates({ car_data["year"] }, "%Y");
	}
	catch (const std::exception& e) {
		std::cerr << e.what() << "\n\n";
	}

	std::cout << head(car_data);

}