The biological perspective
A genetic map provides the position of genetic markers along chromosomes. Geneticists often have to visualize these maps and calculate their basic statistics (length, # of markers, gap size..). Multiple maps that share some markers have to be dealt with when several segregating populations are studied. These maps are compared to highlight their overall relative strengths and weaknesses (e.g. via marker distributions or map lengths), or local marker inconsistencies.
The Genetic Map Comparator is an effective user-friendly tool to complete these tasks. It is possible to upload your genetic maps and explore them using the various sheets accessible via links at the top of the window. The app provides example datasets, which makes it easy to understand its capacity in less than 2 minutes, so why not have a look?
The Dataviz perspective
This app highlights a few features of the power of shiny as a dataviz explorative tool:
- The insertion of interactive charts (mainly using plotly) is straightforward
- CSS can be applied, which gives a nice look to the app
- It is easy to share the tool: in our case we installed it on our private shiny server, but the app is also usable from the github repository!
- It is possible to load your files into the app, and export results really easily
If you want to see how to use these features, the code is freely available on github.
Here is a screenshot of the main tabs of the app: