December 2018
Beginner to intermediate
682 pages
18h 1m
English
Content preview from Numerical Computing with Python
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How it works...
By default, the pct_change Series method calculates the percentage change between the current element and the previous element. This transforms the raw stock closing prices into daily percentage returns. The first element of the returned Series is a missing value as there is no previous price.
Histograms are fantastic plots to summarize and visualize one-dimensional numeric data. It is clear from the plot that the distribution is symmetrical but it remains difficult to determine whether it is normal or not. There are formal statistical procedures to determine the normality of a distribution but we will simply find how close the data matches the 68-95-99.7 rule.
Step 5 calculates the number of standard deviations away from ...
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