HELP data set

Example 9.17: (much) better pairs plots

December 6, 2011 | Nick Horton

Pairs plots (section 5.1.17) are a useful way of displaying the pairwise relations between variables in a dataset. But the default display is unsatisfactory when the variables aren't all continuous. In this entry, we discuss ways to improve these dis...
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Example 8.24: MplusAutomation and Mplus

February 7, 2011 | Nick Horton

In recent entries (here, here, and here), we've been fitting a series of latent class models using SAS and R. One of the most commonly used and powerful software package for latent class model estimation is Mplus. This commercial software includes su...
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Example 8.21: latent class analysis

January 18, 2011 | Nick Horton

Latent class analysis is a technique used to classify observations based on patterns of categorical responses. Collins and Lanza's book,"Latent Class and Latent Transition Analysis," provides a readable introduction, while the UCLA ATS center has an o...
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Example 8.11: violin plots

October 26, 2010 | Nick Horton

We've continued to get useful feedback and ideas from our posts on the combination dotplot/boxplot and other ways to craft similar displays. Another notion is the violin plot, which combines a boxplot and a (doubled) kernel density plot. While the ba...
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Example 8.3: pyramid plots

August 30, 2010 | Nick Horton

Pyramid plots are a common way to display the distribution of age groups in a human population. The percentages of people within a given age category are arranged in a barplot, often back to back. Such displays can be used distinguish males vs. femal...
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Example 7.28: Bubble plots

March 22, 2010 | Ken Kleinman

A bubble plot is a means of displaying 3 variables in a scatterplot. The z dimension is presented in the size of the plot symbol, typically a circle. The area or radius of the circle plotted is proportional to the value of the third variable. This c...
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