Find the shape inside the data.

PCA rotates a cloud toward the direction where it varies most. MDS starts with distances and lays them out so nearby points stay nearby. Change the points and watch both ideas update.

PCA: maximum variation

The orange arrow is the first principal direction. Points are projected onto it, turning a 2D cloud into its strongest 1D summary.

Direction angle--
Explained share--

Make your own cloud

One point per line as x,y. The calculation is local to this page and the note below can be exported.

Ready to explore.

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