buildWijMatrix: buildWijMatrix

In largeVis: High-Quality Visualizations of Large, High-Dimensional Datasets

Description

Rescale the weights in an edge matrix to match a given perplexity.

Usage

buildWijMatrix(x, threads = NULL, perplexity = 50)

## S3 method for class 'edgematrix'
buildWijMatrix(x, threads = NULL, perplexity = 50)

## S3 method for class 'TsparseMatrix'
buildWijMatrix(x, threads = NULL, perplexity = 50)

## S3 method for class 'CsparseMatrix'
buildWijMatrix(x, threads = NULL, perplexity = 50)

Arguments

x	An edgematrix, either an 'edgematrix' object or a sparse matrix.
threads	The maximum number of threads to spawn. Determined automatically if NULL (the default).
perplexity	Given perplexity.

Value

A list with the following components:

'dist'

An [N,K] matrix of the distances to the nearest neighbors.

'id'

An [N,K] matrix of the node indexes of the neartest neighbors. Note that this matrix is 1-indexed, unlike most other matrices in this package.

'k'

The number of nearest neighbors.

largeVis documentation built on Feb. 17, 2018, 1:01 a.m.