Question

我的数据集包含两列：

日期为Date类，因此不是字符串yyyy-mm-dd;
一定数量。

我想删除2017年的所有行。

df$date > "2016-12-31"（因此使用＆gt;符号）不断发出警告

＆＃34;日期错误＆gt; ＆＃34; 2016年12月31日＆＃34; ：比较（6）仅适用于原子和列表类型＆＃34;

在很多很多方面我尝试过它。似乎只是＆＃34;＆lt;＆＃34;虽然这些是大多数在线解决方案，但是无法使用。知道如何以另一种方式删除特定年份的行吗？

Answer 1

使用df <- df[format(df$date,'%Y') != "2017", ]：

//-- onCreate

inAppPurchase = new InAppPurchase(this);


//--- calling on button click

inAppPurchase.purchase(this, "android.test.purchased", "123");


//--- class InAppPurchase

public class InAppPurchase {

    public static final String BASE64_ENCODED_PUBLIC_KEY = "XXXXXXXXXXX"; // CONSTRUCT_YOUR_KEY_AND_PLACE_IT_HERE
    public static final int RC_REQUEST = 10001;
    String playStoreProductId;
    IabHelper mHelper;
    Activity activity;

    public InAppPurchase() {
        // TODO Auto-generated constructor stub
    }

    public InAppPurchase(Activity activity) {
        // TODO Auto-generated constructor stub
        mHelper = new IabHelper(activity, BASE64_ENCODED_PUBLIC_KEY);
        mHelper.enableDebugLogging(true);

        // Start setup. This is asynchronous and the specified listener will be called once setup completes.
        Log.d("", "Starting setup.");
        mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() 
        {
            public void onIabSetupFinished(IabResult result) 
            {
                 if (!result.isSuccess()) 
                 {
                     Log.e("", "Problem setting up in-app billing: " + result);
                 }
                 else
                 {
                     Log.e("", "Setup successful. Querying inventory.");     
                 }
            }
        });
    }

    public void purchase(Activity activity, String playStoreProductId, String orderId)
    {
        this.activity = activity;
        this.playStoreProductId = playStoreProductId;
        String payload = orderId;
        mHelper.launchPurchaseFlow(activity, playStoreProductId, RC_REQUEST, mPurchaseFinishedListener, payload);       
    }

    // Callback for when a purchase is finished
    IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener = new IabHelper.OnIabPurchaseFinishedListener() 
    {
        public void onIabPurchaseFinished(IabResult result, Purchase purchase) 
        {
            Log.e("", "Purchase finished: " + result + ", purchase: " + purchase);
            if (result.isFailure()) 
            {
                Log.e("", "Error purchasing: " + result);
            }
            else if(purchase.getSku().equals(playStoreProductId))
            {
                Log.e("", "Purchase product. Starting product consumption." + playStoreProductId);
                mHelper.queryInventoryAsync(mGotInventoryListener);
            }
        }
    };

    // Listener that's called when we finish querying the items and subscriptions we own
    IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() 
    {
        public void onQueryInventoryFinished(IabResult result, Inventory inventory) 
        {
            Log.e("", "Query inventory finished.");
            if (result.isFailure()) 
            {
                Log.e("", "Failed to query inventory: " + result);
            }
            else //if(result.isSuccess()) 
            {
                Log.e("", " else We have product. Consuming it." + playStoreProductId);
                Purchase purchase = inventory.getPurchase(playStoreProductId);
                if (purchase != null) 
                {
                    Log.e("", "We have product. Consuming it.");
                    mHelper.consumeAsync(inventory.getPurchase(playStoreProductId), mConsumeFinishedListener);
                }
            }
        }
    };

    // Called when consumption is complete
    IabHelper.OnConsumeFinishedListener mConsumeFinishedListener = new IabHelper.OnConsumeFinishedListener() 
    {
        public void onConsumeFinished(Purchase purchase, IabResult result) 
        {
            Log.e("", "Consumption finished. Purchase: " + purchase + ", result: " + result);
            if (result.isSuccess()) 
            {
                // Save Data
                Log.e("", "Consumption successful. Provisioning.");
            }
            else 
            {
                Log.e("", "Error while consuming: " + result);
            }
        }
    };
}



protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    Log.e("", "onActivityResult(" + requestCode + "," + resultCode + "," + data);

    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == InAppPurchase.RC_REQUEST) 
    {
        int responseCode = data.getIntExtra("RESPONSE_CODE", 0);
        String purchaseData = data.getStringExtra("INAPP_PURCHASE_DATA");
        String dataSignature = data.getStringExtra("INAPP_DATA_SIGNATURE");
        Log.e("", ""+responseCode + " " + purchaseData + " " + dataSignature);
        if (resultCode == RESULT_OK) 
        {
            if(responseCode == IabHelper.BILLING_RESPONSE_RESULT_OK)
            {
                try 
                {
                    JSONObject jo = new JSONObject(purchaseData);
                    String mOrderId = jo.getString("orderId");
                    String mPackageName = jo.getString("packageName");
                    String mSku = jo.getString("productId");
                    long mPurchaseTime = jo.getLong("purchaseTime");
                    int mPurchaseState = jo.getInt("purchaseState");
                    String mDeveloperPayload = jo.getString("developerPayload");
                    String mToken = jo.optString("token", jo.getString("purchaseToken"));
                }
                catch (JSONException e) 
                {
                    Log.e("", "Failed to parse purchase data.");
                    e.printStackTrace();
                }   
            }
            else if(responseCode == IabHelper.BILLING_RESPONSE_RESULT_USER_CANCELED)
            {

            }
            else if(responseCode == IabHelper.BILLING_RESPONSE_RESULT_SERVICE_UNAVAILABLE)
            {
                Toast.makeText(getApplicationContext(), "Network connection is down", 1).show();
            }
        }
        else if (resultCode == RESULT_CANCELED) 
        {
            Toast.makeText(getApplicationContext(), "Payment Canceled", 1).show();
        }
    }
}

Answer 2

如果df$date与班级Date相符则应该有效。参见示例：

> df <- data.frame(date = as.Date(runif(10, -200, 200), origin = Sys.Date()))
> df
         date
1  2017-03-02
2  2017-05-09
3  2016-09-08
4  2016-10-27
5  2016-12-03
6  2016-07-05
7  2017-02-21
8  2017-05-24
9  2016-07-04
10 2016-09-06
> 
> df$date > "2016-12-31"
 [1]  TRUE  TRUE FALSE FALSE FALSE FALSE  TRUE  TRUE FALSE FALSE

删除特定年份（日期）的行

2 个答案: