Assignment 2¶

If you are using the virtual environment, launch JupyterLab by clicking this button:

If you have installed Python locally, launch JupyterLab by running:

conda activate sds

and

jupyter lab

Task 1 (5 points)¶

In your new Jupyter Notebook, write some Python code that returns the following:

a) a variable named willamette that contains the length of the Willamette River (187 miles) in kilometers
b) a variable named mckenzie that contains the length of the McKenzie River (145 km) in miles
c) a variable named combined that contains the combined length of the Willamette and McKenzie rivers in kilometers

Note that we can convert from miles to kilometers by multiplying the length value by 1.609.

Task 2 (5 points)¶

Write some Python code that prints the data types of the following variables:

a) city = 'Eugene'

b) distance = 10.5

c) coins = 3

d) beans = '3.0'

e) time = 14.32

Task 3 (5 points)¶

Here is a list of apple varieties:

apples = ['empire', 'fuji', 'pink lady', 'gala', 'golden delicious', 'granny smith', 'honeycrisp', 'mcintosh', 'red delicious', 'braeburn', 'holstein', 'cameo', 'lady alice', 'envy', 'pazazz', 'jazz', 'hidden rose', 'ambrosia', 'jonagold', 'gravenstein', 'liberty', 'winesap', 'mutsu', 'opal', 'pacific rose']

Copy and paste this list into your notebook and write some Python code to answer the following:

a) How many items are in this list?
b) Which is the seventh item in this list?

Click to reveal hint

Remember that Python indexing starts at zero.

c) Which is the last item in this list?
d) After sorting alphabetically, which is fifth item in the list?
e) After sorting reverse alphabetically, which is twelfth item in the list?

Task 4 (5 points)¶

array = np.array([[6, 7, 4, 9, 0, 4, 2, 3, 8, 2],
       [2, 3, 2, 0, 4, 8, 7, 7, 9, 2],
       [0, 4, 9, 3, 9, 7, 0, 1, 1, 1],
       [5, 7, 3, 5, 0, 1, 7, 0, 5, 9],
       [3, 3, 10, 8, 4, 6, 2, 0, 6, 4],
       [5, 5, 2, 1, 6, 1, 4, 8, 3, 1],
       [7, 7, 9, 9, 1, 3, 5, 6, 7, 3],
       [9, 0, 7, 9, 5, 2, 9, 3, 6, 1],
       [1, 2, 4, 0, 6, 7, 4, 2, 8, 8],
       [4, 6, 7, 9, 5, 4, 9, 1, 1, 7]])

Hint

Remember to import numpy as np.

Copy and paste this 2D array into your notebook and answer the following questions:

a) How many rows and columns does this array have?
b) What is the mean and standard deviation of this array?
c) How many values are equal to 0?
d) How many values are greater than 7?
e) What is the mean value of the seventh row?

Task 5 (5 points)¶

a) Calculate the Euclidean distance between Point A (10 E, 10 N) and Point B (30 E, 30 N) using NumPy and the following formula.

\[ distance = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]

Click to reveal hint

Consider using np.sqrt and np.square.

b) Calculate the Euclidean distance between Los Angeles (385213 E, 3768641 N) and Eugene (493046 E, 4877663 N) in kilometers.

Hint

The units of the coordinates are in meters.

Print both your answers in a human-readable way using f-string formatting.

Task 6 (5 points)¶

Add a title, your name, and date of this submission to your Jupyter Notebook using Markdown text.
Add some more Markdown text to separate each task of this assignment and use f-strings to make yours answers clear.

Important

Save your notebook to your local course folder and submit assignment (in .pdf format) to Canvas by the deadline.

Programming for spatial data science

Assignment 2

Contents