# Using the GenometriCorr package

I was reading through the bedtools jaccard documentation when I saw the reference "Exploring Massive, Genome Scale Datasets with the GenometriCorr Package". Firstly for those wondering what the Jaccard index is, it's a simple metric that is defined as so:

The numerator is the number of intersections between A and B, and the denominator is the union of A and B. If you wanted a metric to summarise the amount of intersection between two sets of features, check out bedtools jaccard. Back to the topic, I decided to check out the paper, as the title attracted me and I wanted to learn more about the GenometriCorr package. It turns out that it's an R package.