Monthly Archives: May 2010

First annual R plot replication prize

May 3, 2010
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First annual R plot replication prize

$100 to the first person who can figure out how I created this plot and replicate it. Some hints:It was done in R. There is only one underlying probability distribution involved (one “rdist()“). Including the “plot” statement, I created this with 3 short lines of code.This is based on a random sampling of unstated size, so

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Example 7.35: Propensity score matching

May 3, 2010
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Example 7.35: Propensity score matching

As discussed in example 7.34, it's sometimes preferable to match on propensity scores, rather than adjust for them as a covariate.SASWe use a suite of macros written by Jon Kosanke and Erik Bergstralh at the Mayo Clinic. The dist macro calculates the ...

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Displaying data using level plots

May 3, 2010
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Displaying data using level plots

A level plot is a type of graph that is used to display a surface in two rather than three dimensions – the surface is viewed from above as if we were looking straight down and is an alternative to a contour plot – geographic data is an example of where this type of graph

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The new GUI for ggplot2 (using Deducer) – the designer wants your opinion

May 1, 2010
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After discovering that R is expected (this summer) to have a GUI for ggplot2 (through deducer), I later found Ian’s gsoc proposal for this GUI.  Since the system is in it’s early stages of development, Ian has invited people to give comments, input and critique on his plans for the project. For your convenience (and with Ian’s permission), I...

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