Monthly Archives: March 2012

VIDEO:Looking to "NIR" Spectra in "R": (Import and organize)

March 24, 2012
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VIDEO:Looking to "NIR" Spectra in "R":  (Import and organize)

 

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Linking apple liking to sensory

March 24, 2012
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Linking apple liking to sensory

Previously it was seen that apple liking was related to consumers scores for juiciness and sweetness. It would be most nice if these scores can be linked to sensory scores. Thus a three block model would result:A block with sensory data describing how ...

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Video: R at Work and at Home

March 24, 2012
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Video: R at Work and at Home

The following video was filmed at Melbourne R Users. The description of the talk from the meetup site: Eu Jin is a Senior Analyst with Deloitte Analytics in Melbourne. He has over four years experience in data mining and statistical … Continue reading →

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R script to calculate QIC for Generalized Estimating Equation (GEE) Model Selection

March 23, 2012
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R script to calculate QIC for Generalized Estimating Equation (GEE) Model Selection

Generalized Estimating Equations (GEE) can be used to analyze longitudinal count data; that is, repeated counts taken from the same subject or site. This is often referred to as repeated measures data, but longitudinal data often has more repeated observations. … Continue reading →

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R script to calculate QIC for Generalized Estimating Equation (GEE) Model Selection

March 23, 2012
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R script to calculate QIC for Generalized Estimating Equation (GEE) Model Selection

Generalized Estimating Equations (GEE) can be used to analyze longitudinal count data; that is, repeated counts taken from the same subject or site. This is often referred to as repeated measures data, but longitudinal data often has more repeated obse...

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Gini Efficient Frontier

March 23, 2012
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Gini Efficient Frontier

David Varadi have recently wrote two posts about Gini Coefficient: I Dream of Gini, and Mean-Gini Optimization. I want to show how to use Gini risk measure to construct efficient frontier and compare it with alternative risk measures I discussed previously. I will use Gini mean difference risk measure – the mean of the difference

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Serious stats – free statistics resources

March 23, 2012
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The companion web site for Serious Stats is now live:http://www.palgrave.com/psychology/baguley/The web site includes:- a free sample chapter (Chapter 15: Contrasts)- data sets- R scripts- 5 online supplements (for meta-analysis, multiple imputation, r...

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Serious stats companion web site now live: sample chapter, data and R scripts

March 23, 2012
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Serious stats companion web site now live: sample chapter, data and R scripts

The companion web site for Serious stats is now live: http://www.palgrave.com/psychology/Baguley/ It includes a sample chapter (Chapter 15: Contrasts), data sets, R scripts for all the examples and supplementary material. Filed under: news, R code, ser...

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Dissimilarity Between Soil Profiles: A Closer Look

March 23, 2012
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Dissimilarity Between Soil Profiles: A Closer Look

Continuing the previous discussion of pair-wise dissimilarity between soil profiles, the following demonstration (code, comments, and figures) further elaborates on the method. A more in-depth discussion of this example will be included as a vignette w...

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Launching iButton Thermochrons with the help of R

March 23, 2012
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Maxim's iButton Thermochron temperature dataloggers are little silver doo-dads the size of a large watch battery that can record up to 2048 time-stamped temperature values. The internal battery is usually good for a few years of use. Maxim supplies a J...

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