Menemukan baris tertentu dalam DataFrame

Tabrakan burung dengan pesawat berbahaya bagi keselamatan manusia dan menjadi perhatian besar bagi upaya konservasi. Untungnya, Federal Aviation Administration telah melacak kejadian satwa liar selama hampir 30 tahun.

Anda akan menggunakan for loop untuk menelusuri basis data FAA Wildlife Strikes. Sebuah pandas DataFrame yang berisi kejadian satwa liar yang bertabrakan dengan pesawat di California dari tahun 1990 hingga 2018 telah dimuat ke sesi Anda. Anda ingin menemukan insiden yang melibatkan Snowy egret, burung migran yang menghabiskan musim dingin di California. Untuk setiap insiden, tampilkan:

Tanggal insiden (kolom INCIDENT_DATE)
Bandara (kolom AIRPORT)
Jenis pesawat (kolom ATYPE)
Tingkat keparahan kerusakan (kolom DAMAGE)

Latihan ini adalah bagian dari kursus

Python untuk Pengguna MATLAB

Petunjuk latihan

Cetak lima baris pertama dari DataFrame wildlife_strikes.
Bangun sebuah for loop yang mengiterasi setiap row dari wildlife_strikes.
Buat pernyataan kondisional yang menentukan apakah SPECIES adalah 'Snowy egret'.
Jika pernyataan if Anda bernilai True, cetak 'INCIDENT_DATE', 'AIRPORT', ' ATYPE', dan 'DAMAGE'.

Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

# Print the first few lines of the wildlife_strikes DataFrame
print(____)

# Loop through each row in wildlife_strikes
for i, ____ in ____.iterrows():
    # Use an if statement to check the species of this row
    if row['____']=='____':
        # Print the INCIDENT_DATE, AIRPORT, ATYPE, and DAMAGE
        print(row['____'],
              ____['AIRPORT'],
              ____['____'],
              ____['____'])

Edit dan Jalankan Kode

Latihan ini adalah bagian dari kursus

Python untuk Pengguna MATLAB

SkillTag.level.beginnerSkillTag.label

4.8+

Mulai Kursus Gratis

This chapter gets you started moving from MATLAB to Python. You'll learn about some of the similarities and differences between MATLAB and Python, how to use methods and packages, and be introduced to the popular NumPy package.

Exercise 1: Welcome to Python!Exercise 2: Basic calculations Exercise 3: Forecasting an investment Exercise 4: Types of variables Exercise 5: Methods and packages Exercise 6: Manipulating strings with methods Exercise 7: Using Python packages Exercise 8: Arrays & plotting Exercise 9: Getting started with NumPy arrays Exercise 10: Plotting bicycle traffic Exercise 11: What predicts animal longevity?

In this chapter, you will build on your new NumPy knowledge. You will dive into NumPy arrays, the Python analog to matrices by performing mathematical operations and indexing. You will also begin to explore another important Python data structure, the list, and then round out the chapter by making customs plots of your arrays using Matplotlib.

Exercise 1: Diving into NumPy arrays Exercise 2: Forecasting over time Exercise 3: How much more do organic avocados cost?Exercise 4: Indexing NumPy arrays Exercise 5: Getting columns from NumPy arrays Exercise 6: Bike traffic throughout the week Exercise 7: Filtering arrays with Boolean indexing Exercise 8: Lists Exercise 9: List exploration Exercise 10: Making NumPy arrays from lists Exercise 11: Operating on lists and arrays Exercise 12: Customizing plots Exercise 13: Colors, linestyles, and legends Exercise 14: Encoding data in color & size Exercise 15: Determine engine types in wildlife strikes

This chapter introduces some powerful Python data structures: the dictionary and the pandas DataFrame. You will learn to create dictionaries by setting key-value pairs, and view then how to view and modify your dictionary. Then you will be introduced to one of the most important packages in the Pythonista's toolbox, pandas. Specifically, you'll focus on the pandas' structure, the DataFrame, which organizes tabular data in an easily accessible way. Lastly, you'll learn how to transform different data types into DataFrames to make your data easier to work with.

Exercise 1: Dictionaries Exercise 2: Which keys?Exercise 3: Get data out Exercise 4: Modifying dictionaries Exercise 5: Introduction to DataFrames Exercise 6: Explore a pandas DataFrame Exercise 7: Plot data from a DataFrame Exercise 8: Accessing pandas DataFrames Exercise 9: Accessing rows and columns Exercise 10: The many flavors of .iloc Exercise 11: Creating pandas DataFrames Exercise 12: From a CSV file Exercise 13: From a dictionary of lists Exercise 14: From a list of dictionaries

You'll finish the course by controlling your Python flow. You will learn how to iterate through different Python data structures using for loops. You will also learn about Python contingencies using if, else, and elif and the Python comparison operators (greater than, less than, etc.) that will decide which lines of your code will be executed. Lastly, you'll circle back to NumPy arrays by using Python comparison operators to filter your arrays.

Exercise 1: Melakukan loop pada data Exercise 2: Melakukan loop pada list Exercise 3: Menumpuk beberapa plot pada satu figur Exercise 4: Perbandingan dan alur kontrol Exercise 5: Menghitung berbagai jenis pesawat Exercise 6: Menemukan baris tertentu dalam DataFrame

Latihan Saat Ini

Exercise 7: Memfilter data Exercise 8: Pengindeksan Boolean untuk statistik cepat Exercise 9: Boolean untuk menang!Exercise 10: Pengindeksan Boolean dan serunya Matplotlib Exercise 11: Bagus sekali!