Question

Consider a Kohonen self-organizing net (given below) with two cluster units and five input units. The weight vectors for the cluster units are given by

w1 = { 3.0,5.0,7.0,9.0,0.1 }

w2 = { 0.1,9.0,7.0,5.0,3.0 }

Use the square of the Euclidean distance to find the winning cluster unit for the input pattern (x)

x = [ 0.0  5.0  0.1  5.0  0.0 ]

Using learning rate of 0.25, find the new weights for the winning unit.

06 Feb 2025
Answer :
Word Count : 459
To solve the problem, we'll follow these steps: 1. Calculate the squared Euclidean distance between the input vector \( \mathbf{x} \) and each cluster weight vector \( \mathbf{w}_1 \) and \( \mathbf{w}_2 \). The squared Euclidean distance between two vectors \( \mathbf{x} = [x_1, x_2, ..., x_n] \) and \( \mathbf{w} = [w_1, w_2, ..., w_n] \) is given by: \[ D^2(\mathbf{x}, \mathbf{w}) = \sum_{i=1}^{n} (x_i - w_i)^2 \] 2. Find the winning cluster unit by determining which weight vector has the smallest squared Euclidean distance to the input vector \( __________ ______ _______ _______ __________ _________ ________ ________ _________ __________ ___ _________.
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