NMF (version 0.21.0)

smoothing: Smoothing Matrix in Nonsmooth NMF Models

Description

The function smoothing builds a smoothing matrix for using in Nonsmooth NMF models.

Usage

smoothing(x, theta = x@theta, ...)

Arguments

x

a object of class NMFns.

theta

the smoothing parameter (numeric) between 0 and 1.

...

extra arguments to allow extension (not used)

Value

if x estimates a \(r\)-rank NMF, then the result is a \(r \times r\) square matrix.

Details

For a \(r\)-rank NMF, the smoothing matrix of parameter \(\theta\) is built as follows: $$S = (1-\theta)I + \frac{\theta}{r} 11^T ,$$ where \(I\) is the identity matrix and \(1\) is a vector of ones (cf. NMFns-class for more details).

Examples

Run this code
# NOT RUN {
x <- nmfModel(3, model='NMFns')
smoothing(x)
smoothing(x, 0.1)
# }

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