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| Both sides previous revisionPrevious revision | Next revisionBoth sides next revision | ||
| data_mining:pca [2014/08/24 02:03] – [Parameterwahl (k)] phreazer | data_mining:pca [2014/08/24 02:06] – [Parameterwahl (k)] phreazer | ||
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| \frac{\frac{1}{m} \sum_{i=1}^m || x^{(i)} - x_{\text{approx}}^{(i)} ||^2}{\frac{1}{m} \sum_{i=1}^m || x^{(i)}||^2} \leq 0.01 | \frac{\frac{1}{m} \sum_{i=1}^m || x^{(i)} - x_{\text{approx}}^{(i)} ||^2}{\frac{1}{m} \sum_{i=1}^m || x^{(i)}||^2} \leq 0.01 | ||
| $$ | $$ | ||
| + | |||
| + | [U,S,V] mit S als diagonale Matrix. | ||
| + | |||
| + | Für ein k, kann $1-\frac{\sum_{i=1}^k S_{ii}}{\sum_{i=1}^n S_{ii}} \leq 0.01$. | ||