Posts Tagged ‘ read from local disk ’

Example 7.13: Read a file with two lines per observation

September 24, 2009
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Example 7.13: Read a file with two lines per observation

In example 7.6 we showed how to retrieve the Amazon sales rank of a book. A cron job on one of our machines grabs the sales rank hourly. We’d like to use this data to satisfy our curiosity about when and how often a book sells. A complication is that the result of the cron job is a...

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Example 7.11: Plot an empirical cumulative distribution function from scratch

August 31, 2009
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Example 7.11: Plot an empirical cumulative distribution function from scratch

In example 7.8, we used built-in functions to produce an empirical CDF plot. But the empirical cumulative distribution function (CDF) is simple to calculate directly, and it might be useful to have more control over its appearance than is afforded by...

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