# bed_absdist: Compute absolute distances between intervals. In rnabioco/valr: Genome Interval Arithmetic in R

## Description

Computes the absolute distance between the midpoint of each x interval and the midpoints of each closest y interval.

## Usage

 1 bed_absdist(x, y, genome) 

## Arguments

 x tbl_interval() y tbl_interval() genome tbl_genome()

## Details

Absolute distances are scaled by the inter-reference gap for the chromosome as follows. For Q query points and R reference points on a chromosome, scale the distance for each query point i to the closest reference point by the inter-reference gap for each chromosome. If an x interval has no matching y chromosome, .absdist is NA.

d_i(x,y) = min_k(|q_i - r_k|)\frac{R}{Length\ of\ chromosome}

Both absolute and scaled distances are reported as .absdist and .absdist_scaled.

Interval statistics can be used in combination with dplyr::group_by() and dplyr::do() to calculate statistics for subsets of data. See vignette('interval-stats') for examples.

## Value

tbl_interval() with .absdist and .absdist_scaled columns.

Other interval statistics: bed_fisher, bed_jaccard, bed_projection, bed_reldist
 1 2 3 4 5 6 genome <- read_genome(valr_example('hg19.chrom.sizes.gz')) x <- bed_random(genome, seed = 1010486) y <- bed_random(genome, seed = 9203911) bed_absdist(x, y, genome)