如何在R中格式化日期？

Question

我尝试使用格式化初始化日期变量以获得日期格式类型20：

upload_date <- as.Date("2017/12/1", format = '%y/%m/%d')

一旦该代码行运行，我收到以下输出：

> str(upload_date) 
Date[1:1], format: NA

有人可以详细说明如何在R中正确格式化日期吗？谢谢。

Answer 1

试试这个

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\DataTables\DioceseDataTable;
use App\DataTables\DioceseDataTablesEditor;
use Illuminate\Support\Facades\Schema;

class DioceseController extends Controller
{
    public function index(DioceseDataTable $dataTable)
    {
        return $dataTable->render('admin.diocese.index');
    }

    public function store(DioceseDataTablesEditor $editor)
    {
        return $editor->process(request());

    }

    public function getTableColumns($table)
    {
        return Schema::getColumnListing($table);
    }

}