用 Python 入门数据科学 | Linux 中国-白红宇

用 Python 入门数据科学 | Linux 中国

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发布时间：2019-03-03

本文共 1725 字，大约阅读时间需要 5 分钟。

Python?????????????

?????????????????????????????????????????????Python??????????????????????????????????????????????????????Python?????????????????????????

??Python????

?????????????????????????????Python???????????????????????????????

python3 -m venv examplesource ./example/bin/activate

??????????example??????????????????????????????????????

??Pandas?NumPy

Pandas?NumPy????????????Pandas????????NumPy??????????????????????

pip3 install pandas

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?????????????????RGB????????sample.csv???

import randomdef rgb():    return random.randint(0, 255) / 255with open('sample.csv', 'w') as f:    f.write('"red","green","blue"\n')    for _ in range(10):        f.write(f'{rgb():.2f},{rgb():.2f},{rgb():.2f}\n')

??Pandas????

Pandas??????CSV????????????????????????????????

from pandas import read_csv, DataFrameimport pandas as pdwith open('sample.csv', 'r') as f:    dataframe = pd.read_csv(f)    dataframe.columns = ['red', 'green', 'blue']    print(dataframe['red'])

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???????????????????????Matplotlib?Seaborn???????????

import matplotlib.pyplot as pltfrom matplotlib import rcParamsimport seaborn as snsplt.use('GTK3Agg')rcParams['figure.figsize'] = 11, 8sns.set_style('darkgrid')with open('sample.csv', 'r') as f:    dataframe = pd.read_csv(f)    dataframe.columns = ['red', 'green', 'blue']plt.plot(dataframe['red'], 'r-')plt.plot(dataframe['green'], 'g-')plt.plot(dataframe['blue'], 'b-')plt.legend(bbox_to_anchor=(1, 1), loc=2, borderaxespad=1)plt.show()

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