Posts Tagged ‘ read from URL ’

Example 9.18: Constructing the fastest relay team via enumeration

January 5, 2012
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Example 9.18: Constructing the fastest relay team via enumeration

In competitive swimming, the medley relay is a team event in which four different swimmers each swim one of the four strokes: freestyle, breaststroke, backstroke, and butterfly. In general, every swimmer might be able swim any given stroke. How can w...

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Example 8.35: Grab true (not pseudo) random numbers; passing API URLs to functions or macros

April 19, 2011
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Example 8.35: Grab true (not pseudo) random numbers; passing API URLs to functions or macros

Usually, we're content to use a pseudo-random number generator. But sometimes we may want numbers that are actually random-- an example might be for randomizing treatment status in a randomized controlled trial.The site Random.org provides truly rando...

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Example 8.12: Bike ride plot, part 1

November 1, 2010
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Example 8.12: Bike ride plot, part 1

The iPhone app Cyclemeter uses the phone's GPS capability to record location and other data, and infer speed, while you ride. I took a ride near my house recently, and downloaded the data. I'd like to examine my route and my speed. A simple plot of ...

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Example 7.8: Plot two empirical cumulative density functions using available tools

August 1, 2009
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Example 7.8: Plot two empirical cumulative density functions using available tools

The empirical cumulative density function (CDF) (section 5.1.16) is a useful way to compare distributions between populations. The Kolmogorov-Smirnov (section 2.4.2) statistic D is the value of x with the maximum distance between the two curves. As an...

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Example 7.6: Find Amazon sales rank for a book

July 20, 2009
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Example 7.6: Find Amazon sales rank for a book

In honor of Amazon's official release date for the book, we offer this blog entry.Both SAS and R can be used to find the Amazon Sales Rank for a book by downloading the desired web page and ferreting out the appropriate line. This code is likely to br...

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