255 search results for "anova"

Why R is Hard to Learn

June 13, 2012
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Why R is Hard to Learn

The open source R software for analytics has a reputation for being hard to learn. It certainly can be, especially for people who are already familiar with similar packages such as SAS, SPSS or Stata. Training and documentation that leverages … Continue reading →

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The aesthetics of error bars

May 27, 2012
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The aesthetics of error bars

This blog and my other main blog (the companion blog for my book) are now syndicated via R-bloggers (posts tagged R only) and statsblogs.com. The latter is a relatively new blog aggregator but looks to have some interesting content. R-bloggers it quite...

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Permutation tests in R

May 21, 2012
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Permutation tests in R

Permuation tests (also called randomization or re-randomization tests) have been around for a long time, but it took the advent of high-speed computers to make them practically available. They can be particularly useful when your data are sampled from unkown … Continue reading →

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Criticism 4 of NHST: No Mechanism for Producing Substantive Cumulative Knowledge

May 18, 2012
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In this fourth part of my series of criticisms of NHST, I’m going to focus on broad

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Extending the sensory profiling data model

May 16, 2012
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Extending the sensory profiling data model

In this post I extend the multiplicative Bayesian sensory profiling model with effects for rounds and sessions. Is is not a difficult extension, but it brings the need for informative priors into the model. I do believe round and session effects exist,...

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The first version of my “inference from iterative simulation using parallel sequences” paper!

May 9, 2012
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From August 1990. It was in the form of a note sent to all the people in the statistics group of Bell Labs, where I’d worked that summer. To all: Here’s the abstract of the work I’ve done this summer. It’s stored in the file, /fs5/gelman/abstract.bell, and copies of the Figures 1-3 are on Trevor’s The post The...

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“Introduction to R” public course

May 8, 2012
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Milano R net, in collaboration with Quantide, organizes an "Introduction to R" courseMilano; June 7-8, 2012 Continue reading →

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Multiplicative effects in sensory panel data

May 7, 2012
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Multiplicative effects in sensory panel data

In a previous post I used JAGS to build the Bayesian equivalent of a two-way ANOVA. Effects were determined of products, panelists and their interaction. In this post this model will be rebuild to provide a more simplified and advanced model. The inter...

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Example 9.30: addressing multiple comparisons

May 7, 2012
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Example 9.30: addressing multiple comparisons

We've been more sensitive to accounting for multiple comparisons recently, in part due to work that Nick and colleagues published on the topic. In this entry, we consider results from a randomized trial (Kypri et al., 2009) to reduce problem drinking ...

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New R User Group in Cologne, Germany

May 1, 2012
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The latest local R user group to join the fold is the Köln R User Group, now the sixth R user group in Germany. Their first group meeting will be on July 6, with presentations on ANOVA, ggplot2 graphics in Deducer, and writing R code with Emacs's Org-mode. If you're in the Cologne area, this would be a great...

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