dist2: Calculate Pairwise Distance from a Matrix

In zhongmicai/complexHeatmap: Make Complex Heatmaps

Description

Calculate Pairwise Distance from a Matrix

Usage

dist2(x, pairwise_fun = function(x, y) sqrt(sum((x - y)^2)), ...)

Arguments

x	A matrix or a list. If it is a matrix, the distance is calculated by rows.
pairwise_fun	A function which calculates distance between two vectors.
...	Pass to as.dist.

Details

You can construct any type of distance measurements by defining a pair-wise distance function. The function is implemented by two nested for loops, so the efficiency may not be so good.

Value

A dist object.

Author(s)

Zuguang Gu <[e-mail]>

Examples

lt = lapply(1:10, function(i) {
    sample(letters, sample(6:10, 1))
})
dist2(lt, function(x, y) {
    length(intersect(x, y))/length(union(x, y))
})

zhongmicai/complexHeatmap documentation built on May 7, 2019, 6:11 a.m.