Posts Tagged ‘ plot colors ’

Example 8.30: Compare Poisson and negative binomial count models

March 15, 2011
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Example 8.30:  Compare Poisson and negative binomial count models

How similar can a negative binomial distribution get to a Poisson distribution?When confronted with modeling count data, our first instinct is to use Poisson regression. But in practice, count data is often overdispersed. We can fit the overdispersio...

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Example 8.13: Bike ride plot, part 2

November 8, 2010
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Example 8.13: Bike ride plot, part 2

Before explaining how to make and interpret the plot above, Nick and I want to make a plea for questions--it's hard to come up with useful questions to explore each week!As shown in Example 8.12, data from the Cyclemeter app can be used to make interes...

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Example 7.29: Bubble plots colored by a fourth variable

March 27, 2010
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Example 7.29: Bubble plots colored by a fourth variable

In Example 7.28, we generated a bubble plot showing the relationship among CESD, age, and number of drinks, for women. An anonymous commenter asked whether it would be possible to color the circles according to gender. In the comments, we showed simp...

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Example 7.15: A more complex sales graphic

October 13, 2009
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Example 7.15: A more complex sales graphic

The plot of Amazon sales rank over time generated in example 7.14 leaves questions. From a software perspective, we'd like to make the plot prettier, while we can embellish the plot to inform our interpretation about how the rank is calculated.For the latter purpose, we'll create an indicator of whether the rank was recorded in nighttime (eastern US...

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