Blog Archives

Introduction to R for Excel Users

May 3, 2016
By
Introduction to R for Excel Users

When all you have is a hammer...Engineers and scientists, Excel is the hammer. #Rstats is a toolkit. Here's an intro.

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Update to plot.qcc using ggplot2 and grid

January 15, 2016
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Update to plot.qcc using ggplot2 and grid

plot.qcc updated for compatibility with ggplot2 v2.0. Use grid with qcc!

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Explorable, multi-tabbed reports in R and Shiny

January 2, 2016
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Explorable, multi-tabbed reports in R and Shiny

I take a prior example of multi-tabbed reports and rework it in R and Shiny, with some data visualization improvements.

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Can We do Better than R-squared?

May 16, 2014
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Can We do Better than R-squared?

Blog post: R-squared can mislead us. Here are two related statistics for a better assessment of regression models.

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A Simple Introduction to the Graphing Philosophy of ggplot2

March 28, 2014
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A Simple Introduction to the Graphing Philosophy of ggplot2

Blog post: a very basic introduction to building data plots using ggplot2 in R. #Rstats

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Normality and Testing for Normality

March 21, 2014
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Normality and Testing for Normality

How do we test for normality, and are normality tests really sensitive in the tails?

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Rewriting plot.qcc using ggplot2 and grid

March 3, 2014
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Rewriting plot.qcc using ggplot2 and grid

A new ggplot2-based implementation of control charts for the #RStats package qcc, and some lessons learned along the way.

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Individuals and Moving Range Charts in R

March 1, 2014
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Individuals and Moving Range Charts in R

Individuals and moving range charts, abbreviated as ImR or XmR charts, are an important tool for keeping a wide range of business and industrial processes in the zone of economic production, where a process produces the maximum value at the minimum costs. While there are many commercial applications that will produce such charts, one of

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Is there a Market for Premium R Packages?

November 19, 2010
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Is there a Market for Premium R Packages?

Nathan Yau, of the excellent FlowingData blog, recently asked on his Twitter stream: I wonder if there’s a market for premium R packages, like there is for say, @wordpress themes and plugins There are some great packages available for R, all of which are currently free. I think it would be great if authors like

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R Function Reference

September 15, 2010
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R Function Reference

The R Function Reference is a mind map that I've created to help novice and intermediate R users perform common tasks and analyses.

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