Data Visualisation

Venn diagrams: a visualization nightmare!

I was recently reading a paper (a very inspiring read mapper for RNA-Seq!).  At some point the authors wanted to present the overlap between splice junctions detected by 4 RNA-Seq read mappers and choose to do so using the ubiquitous Venn diagram (see Fig. 1).  I spent a few minutes staring at this colorful mosaic...  without gaining much insight. Fig. 1:  Example of a four-way Venn diagram. Reproduced from figure 4b of Genome Biology, 14(3):R30, 2013. Which mappers overlapped most in [...]

By | October 20, 2014|Categories: Bioinformatics, Data Visualisation, Statistics|0 Comments

Teach me how to box-plot!

Boxplots are everywhere! Publishers like boxplots.  But ask some people and most don't even know what a boxplot represents!  Recently I wanted to examine gene expression data between two samples for a certain gene. The gold standard to look at it would be *drum roll*... A boxplot! Interesting fact #1: Did you know a boxplot is called a “box and whiskers plot” as well?  Let's take a look! A boxplot is easily generated in the analysis software R and its interpretation [...]

By | September 21, 2014|Categories: Data Visualisation, R, Statistics|0 Comments