998 search results for "Latex"

Phase space plot of the kicked rotor

April 21, 2012
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Phase space plot of the kicked rotor

In the idealized physical world, a rotor is simply a mass attached to an axis of length , free to move in the plane. Gravity and friction are absent. Such a rotor becomes a kicked rotor if it is periodically hit with a hammer. Every kick transfers momentum to the rotor and the time between

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Most profitable hedge fund style

April 21, 2012
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Most profitable hedge fund style

This is not an investment advice!! Couple of weeks back, during amst-R-dam user group talk on backtesting trading strategies using R, I mentioned the most effective style for hedge funds is relative value statistical arbitrage, I read it somewhere. After … Continue reading →

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knitr Performance Report-Attempt 2

April 18, 2012
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knitr Performance Report-Attempt 2

Over the years I have changed my learning process from reading thoroughly first before proceeding to reading minimally and then applying immediately.  I very quickly see the gaps in my knowledge.  This method is far more painful but seems to ...

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Linguistic Notation Inside of R Plots!

April 14, 2012
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Linguistic Notation Inside of R Plots!

So, I've been playing around with learning knitr, which is a Sweave-like R package for combining LaTeX and R code into one document. There's almost no learning curve if you already use Sweave, and I find a lot of knitr's design and usage to be a lot nicer.I wasn't going to make a blog post or tutorial about...

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knitr Performance Report-Attempt 1

April 13, 2012
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knitr Performance Report-Attempt 1

I get very excited about new R packages, but rarely is my excitement so fulfilled as with knitr.  Even with no skill, I have already been able to adapt the example Yihui Xie provides in his knitr Graphics Manual into a crude first version of a per...

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Getting knitr to work with StatET

April 13, 2012
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Getting knitr to work with StatET

StatET (an Eclipse plug-in that can handle, among other things, R) offers support for writing Sweave (.Rnw) documents. This is done via the external tool dialog, where one creates a new “device” that takes in a document and runs it over appropriate functions and programs. In this case, Sweave and LaTeX. This dialog can, however,

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What are the distributions on the positive k-dimensional quadrant with parametrizable covariance matrix? (solved)

April 7, 2012
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What are the distributions on the positive k-dimensional quadrant with parametrizable covariance matrix? (solved)

Paulo (from the Instituto de Matemática e Estatística, Universidade de São Paulo, Brazil) has posted an answer to my earlier question both as a comment on the ‘Og and as a solution on StackOverflow (with a much more readable LaTeX output). His solution is based on the observation that the multidimensional log-normal distribution still allows

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Writing reproducibly in the open with knitr

April 7, 2012
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Writing reproducibly in the open with knitr

Sweave is something of a gold standard in reproducible research. It creates a dynamic document, written in a mix of LaTeX and R code where the results of the analysis (numbers, figures, tables) are automatically generated from the code and inserted into the resulting pdf document, making them easy to update if the data or

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Writing reproducibly in the open with knitr

April 7, 2012
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Writing reproducibly in the open with knitr

Sweave is something of a gold standard in reproducible research. It creates a dynamic document, written in a mix of LaTeX and R code where the results of the analysis (numbers, figures, tables) are automatically generated from the code and inserted in...

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Review: Kölner R Meeting 30 March 2012

April 4, 2012
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Review: Kölner R Meeting 30 March 2012

The first Kölner R user meeting was great fun. About 20 useRs had turned up to exchange their ideas, questions and experience with R. Three talks about R & Excel, ggplot2 & XeLaTeX and Dynamical systems with R & simecol had kicked off the evening, wit...

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