430 search results for "knitr"

Rook rocks! Example with googleVis

August 1, 2012
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Rook rocks! Example with googleVis

What is Rook?Rook is a web server interface for R, written by Jeffrey Horner, the author of rApache and brew. But unlike other web frameworks for R, such as brew, R.rsp (which I have used in the past1), Rserve, gWidgetWWWW or sumo (which I haven't used...

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Highlights from the useR! 2012 conference

August 1, 2012
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Highlights from the useR! 2012 conference

Video (screencast) of the presentation by Szilard Pafka at the Los Angeles R users group. I summarized (with short demos) a few of the talks from the useR! 2012 conference. We are planning one more meetup to cover more talks. … Continue reading →

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Petrol prices adjusted for inflation

July 28, 2012
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Petrol prices adjusted for inflation

Petrol prices adjusted for inflation (Perth, Western Australia) The thought for this sprung to mind when I saw petrol drop below $1.20 per litre the other day, and it made me think, I remember paying that when I got to … Continue reading →

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renaming data frame columns in lists

July 24, 2012
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renaming data frame columns in lists

Renaming the columns of data frames which are stored in lists of lists Renaming the columns of data frames which are stored in lists of lists OK, so the scenario is as follows: we have a...

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Faster R in Hadoop: rmr 1.3 now available

July 23, 2012
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The RHadoop project continues the Big Data integration of R and Hadoop, with a new update to its rmr package. Version 1.3 of rmr improves the performance of map-reduce jobs for Hadoop written in R. New features include: An optional vectorized API for efficient R programming when dealing with small records. Fast C implementations for serialization and deserialization from...

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How to track Twitter unfollowers in R

July 18, 2012
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How to track Twitter unfollowers in R

I have Twitter account and it is relatively easy to see new followers or subscribers. However, I was looking for ways to know who are the unfollowers. I have noticed, that some (un)subscriptions happen in bulks, which made me thinking that either I tweeted some bullshit and upset bunch of people or spam bots work

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Analysing time course microarray data using Bioconductor: a case study using yeast2 Affymetrix arrays

July 13, 2012
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Analysing time course microarray data using Bioconductor: a case study using yeast2 Affymetrix arrays

A few years ago I was involved in analysing some time-course microarray data. Our biological collaborators were interested in how we analysed their data, so this lead to a creation of tutorial, which in turn lead to a paper. When we submitted the paper, one the referees “suggested” that we write the paper using Sweave;

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Validating email adresses in R

July 5, 2012
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I currently program an automated report generation in R – participants fill out a questionnaire, and they receive a nicely formatted pdf with their personality profile. I use knitr, LaTex, and the sendmailR package. Some participants did not provide valid email addresses, which caused the sendmail function to crash. Therefore I wanted some validation of

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Rchievement of the day #3: Bloggin’ from R

July 1, 2012
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Rchievement of the day #3: Bloggin’ from R

I have become a complete knitr addict of late and have been using it in combination with RStudio’s R markdown support on a regular basis. In fact I wrote this post using it! It then dawned on me how great it would be if I … Continue reading →

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