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ProjectionBasedClustering (version 1.0.1)

klrank: Computes rank-based smoothed precision/recall

Description

Compares the projection in pData with the original data in Data and calculates the rank-based smoothed recall and precision.

Usage

klrank(Data, pData, NeighborhoodSize)

Arguments

Data

Matrix of original data

pData

Matrix of projected data

NeighborhoodSize

Sets the 'effective number of neighbors' used to control the width of the Gaussian

Value

Rank-based smoothed recall and smoothed precision. It's important to note that all values are the real result substracted from one. So precision_best is (1-precision_best).

References

Jarkko Venna, Jaakko Peltonen, Kristian Nybo, Helena Aidos, and Samuel Kaski. Information Retrieval Perspective to Nonlinear Dimensionality Reduction for Data Visualization. Journal of Machine Learning Research, 11:451-490, 2010.