4 ms·
Projection is a type of embedding. But you can't really describe what LTSA, UMAP, etc. do as projection. LTSA "unrolls" data rather than projecting it.
by thanatropism 8y ago
Projection is a type of embedding. But you can't really describe what LTSA, UMAP, etc. do as projection. LTSA "unrolls" data rather than projecting it.
- xapata 8y agoOn the contrary, I'd say an "unrolling" is a non-linear projection. Wikipedia suggests that embedding is a type of projection. I hadn't heard the term before today. https://en.wikipedia.org/wiki/Nonlinear_dimensionality_reduction#Modified_Locally-Linear_Embedding_(MLLE) https://en.wikipedia.org/wiki/Nonlinear_dimensionality_reduc...