我正在尝试在数据框中添加一列,其中包含同一数据框中一列的所有值的总和。
例如: 图片中有列-UserID,MovieID,Rating,Unixtimestamp。 现在,我想添加一个名为Sum的列,其中将包含Rating Column的所有值的总和。
我有一个评分数据框
Ratings DataFrame列名称:USerID,MovieID,Ratings,UnixTimeStamp。
+------+-------+------+-------------+
|UserID|MovieID|Rating|UnixTimeStamp|
+------+-------+------+-------------+
| 196| 242| 3| 881250949|
| 186| 302| 3| 891717742|
| 22| 377| 1| 878887116|
| 244| 51| 2| 880606923|
| 166| 346| 1| 886397596|
+------+-------+------+-------------+
仅显示前5行
我必须计算wa等级并将其存储到数据框中。
wa_rating =(rating> 3)/总评分
请帮助我找到wa_rating数据框,其中包含一个使用scala spark的新列
答案 0 :(得分:2)
检查一下:
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{
public override bool FinishedLaunching(UIApplication uiApplication, NSDictionary launchOptions)
{
Rg.Plugins.Popup.Popup.Init();
CachedImageRenderer.Init();
global::Xamarin.Forms.Forms.Init();
LoadApplication(new App());
FirebasePushNotificationManager.Initialize(launchOptions, true);
FirebasePushNotificationManager.CurrentNotificationPresentationOption = UNNotificationPresentationOptions.Alert | UNNotificationPresentationOptions.Badge;
UNUserNotificationCenter.Current.Delegate = new UserNotificationCenterDelegate();
return base.FinishedLaunching(uiApplication, launchOptions);
}
public class UserNotificationCenterDelegate : UNUserNotificationCenterDelegate
{
public UserNotificationCenterDelegate()
{
}
public override void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification, Action<UNNotificationPresentationOptions> completionHandler)
{
// Do something with the notification
Console.WriteLine("Active Notification: {0}", notification);
// Tell system to display the notification anyway or use
// `None` to say we have handled the display locally.
completionHandler(UNNotificationPresentationOptions.Alert);
}
}
public override void RegisteredForRemoteNotifications(UIApplication application, NSData deviceToken)
{
FirebasePushNotificationManager.DidRegisterRemoteNotifications(deviceToken);
}
public override void FailedToRegisterForRemoteNotifications(UIApplication application, NSError error)
{
FirebasePushNotificationManager.RemoteNotificationRegistrationFailed(error);
}
public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
{
FirebasePushNotificationManager.DidReceiveMessage(userInfo);
// Do your magic to handle the notification data
System.Console.WriteLine(userInfo);
completionHandler(UIBackgroundFetchResult.NewData);
}
}