July 2013

Hierarchical Linear Model

July 22, 2013 | rtutor.chiyau

Linear regression probably is the most familiar technique of data analysis, but its application is often hamstrung by model assumptions. For instance, if the data has a hierarchical structure, quite often the assumptions of linear regression are feas... [Read more...]

Analyzing Your Data on the AWS Cloud (with R)

July 22, 2013 | Tal Galili

Guest post by Jonathan Rosenblatt Disclaimer: This post is not intended to be a comprehensive review, but more of a “getting started guide”. If I did not mention an important tool or package I apologize, and invite readers to contribute in the comments. …Read more » [Read more...]

My first Bioconductor conference (2013)

July 21, 2013 | Yihui Xie

The BioC 2013 conference was held from July 17 to 19. I attended this conference for my first time, mainly because I'm working at the Fred Hutchinson Cancer Research Center this summer, and the conference venue was just downstairs! No flights, no hotel... [Read more...]

Read Excel files from R

July 21, 2013 | Nicola Sturaro Sommacal

Many people still save their data into Microsoft Excel files. This is an unhappy choice for many reasons but many was already written about this topic. Furthermore, unfortunately Excel become a de facto standard in many business environment and this … Continue reading → [Read more...]

Do the Simpsons characters like each other?

July 21, 2013 | Vik Paruchuri

One day, while I was walking around Cambridge, I had a random thought — how do the characters on the Simpsons feel about each other? It doesn’t take long to figure out how Homer feels about Flanders (hint: he doesn’t always like him), or how Burns feels about everyone, ... [Read more...]

iRefR – PPI data access from R

July 21, 2013 | sidderb

I use a lot of protein-protein interaction (PPI) data as biological networks represent the systems within which our genes and proteins of interest function. There are many sources of PPI data, including BioGRID and IntAct etc. A recent effort has … Continue reading → [Read more...]

Le Monde puzzle [#825]

July 20, 2013 | xi'an

The current puzzle is the last one before the summer break and not exciting enough to take along: Take the first ten digits, create five pairs out of those, and for each pair (x,y) derive the quantity (min(x,y)+1.5max(x,y)). What is the collection of pairs ...
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BCEs0

July 20, 2013 | Gianluca Baio

BCEs0 is the new R package I've written $-$ well, nearly finished to, anyway; it should be ready in version 1.0 in the next few days. The acronym stands for Bayesian models for Cost-Effectiveness with structural 0s, and it basically implements the mode... [Read more...]

Generalized Linear Modelling in R (part 1)

July 20, 2013 | grumble10

In classical linear modelling we are assuming that the response variable (Y) is normally distributed, however for certain type of data like count data or presence/absence data this is not the case. There is in statistic an ensemble of technique called Generalized Linear Modelling (GLM in short) where the ... [Read more...]

Your science links for the week of July 19th

July 20, 2013 | Ryan Brown

Howdy paleoposse! Here are this weeks sciency links for your weekend reading pleasure.  This weeks links cover gold producing neutron stars, the boredom of travelling to Mars, some words of inspiration from Richard Feynman, and Comic-Con 2013. Things that are science: The Giant Impact Model has long been the go to ... [Read more...]

Column-Major Confusion

July 19, 2013 | ezpz

As a programmer coming from a language like C I am used to understanding multidimensional arrays in the following way:int matrix[3][3] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }};Understandably, this is a little bit of a setback when trying to ... [Read more...]
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