870 search results for "how to import image file to r"

Let’s Party!

June 6, 2012
By
Let’s Party!

Exploring whether regression coefficients differ between groups is an important part of applied econometric research, and particularly for research with a policy based objective. For example, a government in a developing country may decide to introduce free school lunches in an effort to improve childhood health. However, if this treatment is known to only improve

Read more »

Book Review: Parallel R

June 5, 2012
By
Book Review: Parallel R

You have a problem: R is single-threaded, but your code would be faster if it could simultaneously run on more than one core.  You have access to a cluster and/or your computer has multiple cores.  Parallel R, by Q. Ethan McCallum and Stephen...

Read more »

Obtaining a protein-protein interaction network for a gene list in R

June 3, 2012
By
Obtaining a protein-protein interaction network for a gene list in R

Building a network of interaction between a bunch of genes can help a great deal in understanding the relationships between the seemingly disparate elements from your list. It can seems challenging at first to build such network but it's less complicat...

Read more »

The R-Podcast Episode 7: Best Practices for Workflow Management

May 28, 2012
By

Hello everybody, I am finally back with a new episode! In this episode: Hardware issues, major update to RStudio, new forums, and discussion on managing your workflow for projects. I discuss useful functions for executing R scripts and saving/loading R objects for future sessions, and summarize different solutions for organizing R code based on task

Read more »

ABC+EL=no D(ata)

May 27, 2012
By
ABC+EL=no D(ata)

It took us a loooong while but we finally ended up completing a paper on ABC using empirical likelihood (EL) that was started by me listening to Brunero Liseo’s tutorial in O’Bayes-2011 in Shanghai… Brunero mentioned empirical likelihood as a semi-parametric technique w/o much Bayesian connections and this got me thinking

Read more »

A complete Bayesian model for sensory profiling data

May 22, 2012
By
A complete Bayesian model for sensory profiling data

In this post I will try to add an important parts in the sensory profiling model I have been building. This concerns the question: 'Are all panelists equally reproducible?'. Obviously the answer is no, some are better than others. From this observation...

Read more »

Adding watermarks to plots

May 22, 2012
By
Adding watermarks to plots

A question was raised today on the mailing list: Is there an easy way to add a watermark to a ggplot? There are several options, depending on the type of watermark and the required level of control over the output, add a text label using annotate (th...

Read more »

Time-Series Policy Evaluation in R

May 21, 2012
By
Time-Series Policy Evaluation in R

Quantifying the success of government policies is clearly important. Randomized control trials, like those conducted by drug companies, are often described as the ‘gold-standard’ for policy evaluation. Under these, a policy is implemented in/to one area/group (treatment), but not in/to another (control). The difference in outcomes between the two areas or groups represents the effectiveness

Read more »

My two favorite IDE’s for R – tips & tricks

May 20, 2012
By
My two favorite IDE’s for R – tips & tricks

The two IDE that I use for R are RStudio and Eclipse with StatET. They complement each other nicely, RStudio works out of the box while I previously shown how to get Eclipse & StatET going, you can find it here, which is slightly challanging. RStudio I use RStudio for all my statistics where I don't want to create...

Read more »

Finding Waldo, a flag on the moon and multiple choice tests, with R

May 16, 2012
By
Finding Waldo, a flag on the moon and multiple choice tests, with R

I have to admit, first, that finding Waldo has been a difficult task. And I did not succeed. Neither could I correctly spot his shirt (because actually, it was what I was looking for). You know, that red-and-white striped shirt. I guess it sho...

Read more »