Mulai bekerja dengan array NumPy

Jembatan Fremont adalah jalur utama bagi pesepeda yang berangkat kerja menuju pusat kota Seattle dari arah utara. Memahami bagaimana lalu lintas sepeda berubah sepanjang tahun penting untuk perencanaan pengembangan infrastruktur pesepeda yang terhubung ke rute dengan lalu lintas tinggi ini.

Sebuah array numpy daily_riders telah dimuat ke sesi, berisi rata-rata jumlah pesepeda harian yang melintasi Jembatan Fremont untuk setiap bulan di tahun 2016, dimulai dari Januari hingga Desember. Silakan jelajahi array ini!

Latihan ini adalah bagian dari kursus

Python untuk Pengguna MATLAB

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Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

# Determine the type and length of daily_riders
data_type = ____(____)
data_length = len(____)

print("daily_riders is a {} of length {}".format(data_type.__name__, data_length))

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Latihan ini adalah bagian dari kursus

Python untuk Pengguna MATLAB

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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: Selamat datang di Python!Exercise 2: Perhitungan dasar Exercise 3: Membuat proyeksi investasi Exercise 4: Tipe variabel Exercise 5: Metode dan paket Exercise 6: Memanipulasi string dengan metode Exercise 7: Menggunakan paket Python Exercise 8: Array & plotting Exercise 9: Mulai bekerja dengan array NumPy

Latihan Saat Ini

Exercise 10: Memplot lalu lintas sepeda Exercise 11: Apa yang memengaruhi panjang umur hewan?

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: Looping through data Exercise 2: Looping through lists Exercise 3: Overlaying multiple plots on a figure Exercise 4: Comparisons and control flow Exercise 5: Counting different types of aircraft Exercise 6: Finding certain rows in a DataFrame Exercise 7: Filtering data Exercise 8: Boolean indexing for quick stats Exercise 9: Booleans for the win!Exercise 10: Boolean indexing and Matplotlib fun Exercise 11: Well done!