I generated a t-SNE visualization of a dataset (about 10 standardized (mean = 0, sd = 1) numerical features) and I arrived at a following 2-dimensional plot. I don't have a good intuition why the points are aligning in sort of arc-shaped groups, see for example right bottom part of the enclosed picture (or its leftmost part).
I found a similar effect at the original paper http://www.cs.toronto.edu/~hinton/absps/tsne.pdf - see Figure 4.a. However, I didn't find a good explanation of this kind of a phenomenon.
Any intuitions on why this happens?
