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PCA Revisited: Projection and Latent Variables
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- Step 137~20m3D · 21Code · 15★Most cinematic⚡Challenge
PCA as Projection: Minimizing Reconstruction Error
The second face of PCA: project data onto a low-dimensional subspace so that the reconstruction error is as small as possible — and discover…
Open lesson - Step 138~20m3D · 11Code · 15★Most cinematic⚡Challenge
Probabilistic PCA: PCA as a Latent-Variable Model
Give PCA a generative story — Gaussian latents, a linear decoder, and explicit noise — and you get a likelihood, a posterior, missing-data h…
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