3 ms·
> dimensionally invalid What does this mean?
by OscarCunningham 8y ago
> dimensionally invalid
What does this mean?
- thraway180306 8y agoWithout (arbitrary) scaling normalization PCA gives different results with change of dimensional units, that is principal components depend on choice of units or scaling.
- OscarCunningham 8y agoOh okay. I did know about that weakness of PCA. But it seems like in this case letting one prime factor correspond to one unit of distance is a nonarbitrary scaling, so I would expect PCA to give sensible results.