Rescale the weights in an edge matrix to match a given perplexity.
Rescale the weights in an edge matrix to match a given perplexity.
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)
x |
A sparse matrix |
threads |
numeric The maximum number of threads to spawn. Determined automatically if |
perplexity |
numeric Given perplexity (default=50) |
A list with the following components:
An [N,K] matrix of the distances to the nearest neighbors.
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.
The number of nearest neighbors.
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