How is the winning neuron selected by the NEWSOM function within Neural Network Toolbox?

Technical Source
2 min readMay 21, 2021

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I would like to know how the winning neuron is selected by the NEWSOM function within Neural Network Toolbox.

ANSWER

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The NEWSOM function is used to obtain a self-organizing network.

The syntax for this function is as follows:

net = newsom(PR,[d1,d2,...],tfcn,dfcn,olr,osteps,tlr,tns)Description Competitive layers are used to solve classification problems. NET = NEWSOM(PR,[D1,D2,...],TFCN,DFCN,OLR,OSTEPS,TLR,TNS) takes, PR     - Rx2 matrix of min and max values for R input elements. Di     - Size of ith layer dimension, defaults = [5 8]. TFCN   - Topology function, default = 'hextop'. DFCN   - Distance function, default = 'linkdist'. OLR    - Ordering phase learning rate, default = 0.9. OSTEPS - Ordering phase steps, default = 1000. TLR    - Tuning phase learning rate, default = 0.02; TND    - Tuning phase neighborhood distance, default = 1.    and returns a new self-organizing map.

How the winning neuron is selected:

When an input topology is presented to a SOM network,

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