Function to visualize neighborhood kernels

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Description

visKernels is supposed to visualize a series of neighborhood kernels, each of which is a non-increasing functions of: i) the distance d_{wi} between the hexagon/rectangle i and the winner w, and ii) the radius δ_t at time t.

Usage

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visKernels(newpage = T)

Arguments

newpage

logical to indicate whether to open a new page. By default, it sets to true for opening a new page

Value

invisible

Note

There are five kernels that are currently supported:

  • For "gaussian" kernel, h_{wi}(t)=e^{-d_{wi}^2/(2*δ_t^2)}

  • For "cutguassian" kernel, h_{wi}(t)=e^{-d_{wi}^2/(2*δ_t^2)}*(d_{wi} ≤ δ_t)

  • For "bubble" kernel, h_{wi}(t)=(d_{wi} ≤ δ_t)

  • For "ep" kernel, h_{wi}(t)=(1-d_{wi}^2/δ_t^2)*(d_{wi} ≤ δ_t)

  • For "gamma" kernel, h_{wi}(t)=1/Γ(d_{wi}^2/(4*δ_t^2)+2)

These kernels above are displayed within a plot for each fixed radius. Three different radii (i.e., 1 and 2) are illustrated.

See Also

sTrainSeq, sTrainBatch

Examples

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# visualise currently supported five kernels
visKernels()

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