1107 search results for "tutorial"

The R Programming Wikibook

July 8, 2011
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The R Programming Wikibook

The R Programming wikibook is an open source community project that "aims to create a cross-disciplinary practical guide to the R programming language." It was launched in June 2011 and is seeking content and contributors. The full call for the R Progr...

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Things I would tell a budding bioinformatician to learn.

July 7, 2011
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I recently read Ewan Birney's blog post, which I found echoed a lot of my own thoughts about the use of statistical in computational biology. I thought I would compile my own similar list but for bioinformatics  / computational biology in general. I have not been and in the field as long as Ewan and I certainly still...

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ARMA Models for Trading, Part VI

July 5, 2011
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ARMA Models for Trading, Part VI

All posts in this series were combined into a single, extended tutorial and posted on my new blog. In the fourth posting in this series, we saw the performance comparison between the ARMA strategy and buy-and-hold over the last approximately 10 years. Over the last few weeks (it does take time, believe me) I back-tested

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Sentiment Analysis for Airlines via Twitter

July 5, 2011
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Sentiment Analysis for Airlines via Twitter

Last weekend here in the states was the 4th of July long weekend, one of the busier air travel days of the year. As anyone who flies in the States knows, with air travel often comes frustration, and in this social media age many express their frustration on Twitter: The image above comes from a tutorial on text mining...

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In 4 Steps your Application (including R) is running on a Cloud Computing Cluster

In 4 Steps your Application (including R) is running on a Cloud Computing Cluster

Today, cloud computing is used in many application areas from academic research to industry. Commercial cloud providers as Amazon Web Services (AWS) advertise the simple and fast access to cloud computing resources. Posts in different blogs proof that you can get your application running in the cloud, but it will cost you more than 15

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Learning SAS

July 3, 2011
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Learning SAS

I want to learn the heavy-weight of Statistical softwares - SAS. It seems like the default choice for high-end statistics and I want to understand why.I'm working in the healthcare practice in our firm and want to analyze claims and credit data (Teraby...

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Stata 12 embraces structural equation models

June 28, 2011
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Stata 12 embraces structural equation models

Stata 12 has just been announced. The software will start shipping by the end of July.  A key new feature introduced in the new version is the module for structural equation models (SEM), a staple tool in marketing, psychology, and several other research disciplines.LISREL and AMOS have...

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Drawing heatmaps in R

June 24, 2011
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Drawing heatmaps in R

A while back, while reading chapter 4 of Using R for Introductory Statistics, I fooled around with the mtcars dataset giving mechanical and performance properties of cars from the early 70's. Let's plot this data as a hierarchically clustered heatmap.# scale data to mean=0, sd=1 and convert to matrix mtscaled <- as.matrix(scale(mtcars))# create...

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sab-R-metrics: Merging Data Sets

June 22, 2011
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I am finally back from Greece and recovered from jet lag. Fortunately, I did not get tear gassed while in Athens, though there were riot police everywhere the whole time we visited. Today, I'm going to start getting my feet wet again with a shorter s...

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R in the Bioinformatics Knowledgeblog

June 21, 2011
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The Knowledge Blog progect is a new, light-weight way of publishing scientific, academic and technical knowledge on the web, across several scientific disciplines. One such discipline is bioinformatics, and the Bioinformatics Knowledgeblog contains useful scientific reference material for bioinformatics, including several resources for R users. There you'll find an R Guide for Complete Beginners, a tutorial on analyzing microarray...

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