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# What is the special feature of Kohonen SOM?

## What is the special feature of Kohonen SOM?

Kohonen Self-Organizing feature map (SOM) refers to a neural network, which is trained using competitive learning. Basic competitive learning implies that the competition process takes place before the cycle of learning. The competition process suggests that some criteria select a winning processing element.

## What is SOM Ann?

The self-organizing map (SOM) is an unsupervised ANN used for data training to classify and effectively recognize patterns embedded in the input data space.

What is Kohonen self-organizing neural network?

The self-organizing map (SOM) or Kohonen Network is a type of Artificial Neural Network that is trained by a unsupervised learning . It is also called as feature map as it maps the high dimension inputs to a low (typically 2 dimension) discretised dimensional representation and this method is dimensionality reduction.

### How do soms learn?

The SOM is based on unsupervised learning, which means that is no human intervention is needed during the training and those little needs to be known about characterized by the input data.

### What is BMU SOM?

This unit is known as the Best Matching Unit (BMU) since its vector is most similar to the input vector. This selection is done by Euclidean distance formula, which is a measure of similarity between two datasets. The distance between the input vector and the weights of node is calculated in order to find the BMU.

What is SOM good for?

the purpose of SOM is that it’s providing a data visualization technique that helps to understand high dimensional data by reducing the dimension of data to map. SOM also represents the clustering concept by grouping similar data together.

#### How do soms work?

Summary

1. A self-organizing map (SOM) is a grid of neurons which adapt to the topological shape of a dataset, allowing us to visualize large datasets and identify potential clusters.
2. An SOM learns the shape of a dataset by repeatedly moving its neurons closer to the data points.

#### How do SOMs learn?

What is the goal of SOM?

The main objective of a SOM is to transform an incoming signal pattern of arbitrary dimension into a one- or two-dimensional discrete map and to perform this transformation adaptively in a topologically ordered fashion. Any SOM process has four major components: initialization, competition, cooperation, and adaptation.