I am trying to create a SOM map based on records with different discrete classifications (tags) like the example below
Record Tag1 Tag2 Tag3 Tag4
3555 1 0 0 0
6447 1 0 0 0
5523 1 0 1 0
7550 1 0 1 0
6330 1 0 1 0
2451 1 0 0 0
4308 1 0 1 0
8917 0 0 0 0
4780 1 0 1 0
6802 1 0 1 0
2021 1 0 0 0
5792 1 0 1 0
5475 1 0 1 0
4198 1 0 0 0
223 1 0 1 0
4811 1 0 1 0
678 1 0 1 0
The problem I am facing is that there are many empty nodes in the SOM. From what I have read, each node should have 5-10 records but still, this is not working.
Could it be that all observations are very different from one another?
