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. 2016 Jul 15;10:5. doi: 10.3389/fnbot.2016.00005

Figure 10.

Figure 10

The internal states after verb, after objective, and after adverb input, from left to right, respectively, projected onto PC1–PC3 space (CR is 52.2, 40.0, 8.5%, respectively). The cluster structure topologically organized in accordance with the input words can be seen. The broken lines in the right graph roughly indicate the vectors that connect average linking points of two behaviors differing in only the verb element (e.g., HIT-LEFT-SLOWLY and POINT-LEFT-SLOWLY), that is, the POINT-HIT axis. The minimum cosine between two of the four vectors calculated in the original 30-dimensional space was 0.972, indicating that they are almost parallel to each other. In the cases of the LEFT-RIGHT axis and the SLOWLY-FAST axis, the minimum cosines are 0.938 and 0.977, respectively. In contrast, the cosines (1) between the POINT-HIT axis and the LEFT-RIGHT axis, (2) between the POINT-HIT axis and the SLOWLY-FAST axis, and (3) between the LEFT-RIGHT axis and the SLOWLY-FAST axis were 0.079, 0.075, and 0.035, respectively, indicating that these axes are close to orthogonal.