unsupervised-learning 2 topology-preservation 2 som 2 self-organizing-map 2 growing-self-organizing-map 2 batch-learning 2 data-visualization 1 clustering 1 supervised-learning 1 classification 1 vector-quantization 1 dbgsom 1 directed-batch 1 distorsion 1 dynamic-som 1 gsom 1 mapping 1 top-map 1