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Introduction to Data Science: A Python Approach to Concepts, Techniques and Applications

Home Page: http://www.springer.com/gp/book/9783319500164

Jupyter Notebook 100.00%
analytics data data-science datascience machine-learning python sentiment-analysis

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introduction-datascience-python-book's Issues

Minor correction to chapter 3: logic error, outliers treatment

In section 3.3.3 about Outliers Treatment it suggests that we can clean up values that exceed the median by 2 or 3 deviation standard:

df2 = df.drop( df.index[(df.income =='>50K\n') & 
       (df['age'] > df[’age’].median() + 35) & 
       (df['age'] > df[’age’].median() -15)
       ])

This boolean indexed is erroneous because it only cleans values that are more than 35 above the median. A correction might be changing operators > by <, and & by |:

df2 = df.drop( df.index[(df.income=='>50K\n') & 
       ((df['age'] > df['age].median() + 35) | (df['age'] < df['age].median() - 15))])

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