Monthly Archives: March 2012

Citations in markdown using knitr

March 24, 2012
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Citations in markdown using knitr

I am finding myself more and more drawn to markdown rather then tex/Rnw as my standard format (not least of which is the ease of displaying the files on github, particularly now that we have automatic image uploading). One thing I miss from latex is the citation commands. (I understand these can be provided to

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Initial release 0.1.0 of package RcppSMC

March 24, 2012
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Initial release 0.1.0 of package RcppSMC

Hm, I realized that I announced this on Google+ (via Rcpp) as well as on Twitter, on the r-packages list, wrote a new and simple web page for it, but had not put it on my blog. So here is some catching up. Sequential Monte Carlo / Particle Filter is ...

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Custom Summary Stats as Dataframe or List

March 24, 2012
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Custom Summary Stats as Dataframe or List

On Stackoverflow I found this useful example on how to apply custom statistics on a dataframe and return the results as list or dataframe:somedata<- data.frame(               ...

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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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