我有一个名为 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="12">
<androidx.appcompat.widget.AppCompatCheckBox
android:id="@+id/checkid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" />
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2"
android:padding="4dp" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="9"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/textViewTitleid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_toRightOf="@id/imageView"
android:text="Apple MacBook Air Core i5 5th Gen - (8 GB/128 GB SSD/Mac OS Sierra)"
android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
android:textColor="#000000" />
<TextView
android:id="@+id/textViewShortDescid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/textViewTitleid"
android:layout_marginLeft="5dp"
android:layout_marginTop="5dp"
android:layout_toRightOf="@id/imageView"
android:text="13.3 Inch, 256 GB"
android:textAppearance="@style/Base.TextAppearance.AppCompat.Small" />
</LinearLayout>
<!--<TextView-->
<!--android:id="@+id/textViewRatingid"-->
<!--android:layout_width="wrap_content"-->
<!--android:layout_height="wrap_content"-->
<!--android:layout_below="@id/textViewShortDescid"-->
<!--android:layout_marginLeft="5dp"-->
<!--android:layout_marginTop="5dp"-->
<!--android:layout_toRightOf="@id/imageView"-->
<!--android:background="@color/colorPrimary"-->
<!--android:paddingLeft="15dp"-->
<!--android:paddingRight="15dp"-->
<!--android:text="4.7"-->
<!--android:textAppearance="@style/Base.TextAppearance.AppCompat.Small.Inverse"-->
<!--android:textStyle="bold" />-->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:orientation="horizontal">
<TextView
android:id="@+id/textViewPriceid"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="INR 56990"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
>
<Button
android:id="@+id/minusbtn"
android:layout_width="35dp"
android:layout_height="35dp"
android:background="@null"
android:text="-"
android:textSize="16dp" />
<TextView
android:id="@+id/counter_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#DFDDDD"
android:padding="2dp"
android:text="0" />
<Button
android:id="@+id/plusbtn"
android:layout_width="35dp"
android:layout_height="35dp"
android:background="@null"
android:text="+"
android:textSize="16dp" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent">
</androidx.recyclerview.widget.RecyclerView>
</androidx.constraintlayout.widget.ConstraintLayout>
package com.example.mycart;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.appcompat.widget.AppCompatCheckBox;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ProductViewHolder> {
private Context context;
private List<Product> productList;
//static int count =0;
public ProductAdapter(Context context, List<Product> productList) {
this.context = context;
this.productList = productList;
}
@NonNull
@Override
public ProductViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.list, null);
return new ProductViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull final ProductViewHolder holder, int position) {
final Product product = productList.get(position);
holder.textViewTitle.setText(product.getTitle());
holder.textViewDesc.setText(product.getShortdesc());
// holder.textViewRating.setText(String.valueOf(product.getRating()));
holder.textViewPrice.setText(String.valueOf(product.getPrice()));
holder.imageView.setImageDrawable(context.getResources().getDrawable(product.getImage()));
//holder.counterText.setText(String.valueOf(getItemCount()));
holder.count.setText(String.valueOf(product.getCount()));
holder.plusbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
product.setCount(product.getCount() + 1);
holder.count.setText(String.valueOf(product.getCount()));
//product.setCount(product.getCount() + 1);
//holder.count.setText(String.valueOf(product.getCount()+1));
// product.setCount(product.getCount() + 1);
//holder.count.setText(product.getCount());
}
});
holder.minusbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (product.getCount() > 1) {
product.setCount(product.getCount() - 1);
holder.count.setText(String.valueOf(product.getCount()));
//product.setCount(product.getCount() - 1);
//holder.count.setText(String.valueOf(product.getCount()-1));
//product.setCount(product.getCount() - 1);
//holder.count.setText(product.getCount());
}
}
});
}
@Override
public int getItemCount() {
return productList.size();
}
public class ProductViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView textViewTitle, textViewDesc, textViewPrice, count;
AppCompatCheckBox checkBox;
Button minusbtn, plusbtn;
public ProductViewHolder(@NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.imageView);
textViewTitle = itemView.findViewById(R.id.textViewTitleid);
textViewDesc = itemView.findViewById(R.id.textViewShortDescid);
// textViewRating =itemView.findViewById(R.id.textViewRatingid);
textViewPrice = itemView.findViewById(R.id.textViewPriceid);
count = itemView.findViewById(R.id.counter_text);
checkBox = itemView.findViewById(R.id.checkid);
minusbtn = itemView.findViewById(R.id.minusbtn);
plusbtn = itemView.findViewById(R.id.plusbtn);
}
}
}
package com.example.mycart;
public class Product {
private int id;
private String title, shortdesc;
private double price;
private int image;
private int count = 1;
public Product(int id, String title, String shortdesc, double price, int image) {
this.id = id;
this.title = title;
this.shortdesc = shortdesc;
this.price = price;
this.image = image;
}
public void setCount(int count) {
this.count = count;
}
public int getCount() {
return count;
}
public int getId() {
return id;
}
public String getTitle() {
return title;
}
public String getShortdesc() {
return shortdesc;
}
public double getPrice() {
return price;
}
public int getImage() {
return image;
}
}
package com.example.mycart;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
RecyclerView recyclerView;
ProductAdapter adapter;
List<Product> productList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
productList = new ArrayList<>();
recyclerView =(RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
productList.add(
new Product(
1,
"Apple MacBook Air Core i5 5th Gen - (8 GB/128 GB SSD/Mac OS Sierra",
"13.3 inch, Silver, 1.35 kg",
6500.00,R.drawable.macbook));
productList.add(
new Product(
1,
"Apple MacBook Air Core i5 5th Gen - (8 GB/128 GB SSD/Mac OS Sierra",
"13.3 inch, Silver, 1.35 kg",
6500.00,R.drawable.macbook));
productList.add(
new Product(
1,
"Apple MacBook Air Core i5 5th Gen - (8 GB/128 GB SSD/Mac OS Sierra",
"13.3 inch, Silver, 1.35 kg",
6500.00,R.drawable.macbook));
adapter = new ProductAdapter(this,productList);
recyclerView.setAdapter(adapter);
}
}
的xarray DataArray对象。
da_ffdi_daily_max <xarray.DataArray 'FFDI' (time: 3653, latitude: 106, longitude: 193)>
dask.array<shape=(3653, 106, 193), dtype=float32, chunksize=(1, 106, 193)>
Coordinates:
* time (time) datetime64[ns] 2008-01-01 2008-01-02 ... 2017-12-31
* latitude (latitude) float32 -39.2 -39.149525 ... -33.950478 -33.9
* longitude (longitude) float32 140.8 140.84792 140.89584 ... 149.95209 150.0
坐标的范围是2008年1月1日至2017年12月31日。我想将11月的FFDI数据分为三类，即time，Nov 01 - 10和Nov 11-20。
如何通过Nov 21-30的{{1}}函数来实现？
答案 0 :(得分：1)
Groupby通常会尝试将所有数据分类为特定的组，而您似乎正在尝试提取数据的子集。您可以使用常规的日期时间索引制作所需的子集。
a = xr.tutorial.open_dataset('air_temperature')
nov_1_10 = a['air'][(a['time'].dt.day <= 10) & (a['time'].dt.month == 11)]
nov_11_20 = a['air'][(a['time'].dt.day <= 20) & (a['time'].dt.day >= 11) & (a['time'].dt.month == 11)]
nov_21_30 = a['air'][(a['time'].dt.day >= 21) & (a['time'].dt.month == 11)]