find_dm_k {destiny} | R Documentation

## Find a suitable k

### Description

The `k` parameter for the k nearest neighbors used in DiffusionMap should be as big as possible while still being computationally feasible. This function approximates it depending on the size of the dataset `n`.

### Usage

    find_dm_k(n, min_k = 100L, small = 1000L, big = 10000L)

### Arguments

`n` | Number of possible neighbors (nrow(dataset) - 1)
`min_k` | Minimum number of neighbors. Will be chosen for n ≥ big
`small` | Number of neighbors considered small. If/where n ≤ small, n itself will be returned.
`big` | Number of neighbors considered big. If/where n ≥ big, `min_k` will be returned.

### Value

A vector of the same length as `n` that contains suitable `k` values for the respective `n`

### Examples

    curve(find_dm_k(n),     0, 13000, xname = 'n')
    curve(find_dm_k(n) / n, 0, 13000, xname = 'n')

[Package destiny version 3.8.1 Index]