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python:first_course_statistics
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python:first_course_statistics [2016/10/08 09:11] Francesco Beretta [Eruptions of the Old Faithful geyser (p.5)] |
python:first_course_statistics [2016/10/09 23:12] Francesco Beretta [General instructions] |
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| Ligne 1: | Ligne 1: | ||
| - | ====== Lessons ====== | ||
| + | ====== General instructions ====== | ||
| + | Read following important documentation about: | ||
| + | * pandas: accessing dataframes (tables) | ||
| + | * [[http://matplotlib.org/api/pyplot_summary.html|matplotlib.pyplot]] | ||
| - | ===== Eruptions of the "Old Faithful" geyser (p.5) ===== | + | Save your scripts in a folder inside the data folder, calling the script folder 'my_scripts' or whaterver. If 'my-scripts' is set as your [[python:generic_features#get_the_current_working_directory_address|current working directory]], then the data files are available under this address '../[data file]', for instantce: '../geyser1.TAB' |
| + | ====== Eruptions of the "Old Faithful" geyser (p.5) ====== | ||
| - | ==== Histogram (p.5) ==== | + | ===== Histogram (p.5) ===== |
| + | |||
| + | FB: this script works fine ! | ||
| <code python> | <code python> | ||
| - | # fake code – to be deleted | + | import pandas as pd |
| - | import csv | + | import matplotlib.pyplot as plt |
| - | filename = 'ch02-data.csv' | + | gys1 = pd.DataFrame(pd.read_csv('../geyser1.TAB', '\t')) |
| - | f = open(filename) | + | g_int = gys1['Interval'] |
| - | data = [] | + | ax = plt.gca() |
| - | reader = csv.reader(f) | + | ax.hist(g_int, bins=20, color='r') |
| - | header = reader.next() | + | ax.set_xlabel('Intereruption time') |
| - | data = [row for row in reader] | + | ax.set_ylabel('Frequency') |
| - | for datarow in data: | + | ax.set_title('Histogram') |
| - | print datarow | + | plt.show() |
| </code> | </code> | ||
| - | ===== International adoption rates (p.13) ===== | + | ====== International adoption rates (p.13) ====== |
python/first_course_statistics.txt · Dernière modification: 2017/09/26 08:54 par Francesco Beretta
