Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedQualityCalculation.java @ 7707:cead6df5b7b3
Variance is defined as the sum of squared differences.
| author | Tom Gottfried <tom.gottfried@intevation.de> |
|---|---|
| date | Wed, 18 Dec 2013 12:39:18 +0100 |
| parents | 03dc5cc22e26 |
| children | e4606eae8ea5 |
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| 7706:8f1a5d0802b5 | 7707:cead6df5b7b3 |
|---|---|
| 316 i++; | 316 i++; |
| 317 } | 317 } |
| 318 | 318 |
| 319 double sig = 0d; | 319 double sig = 0d; |
| 320 for (i = 0; i < size; i++) { | 320 for (i = 0; i < size; i++) { |
| 321 sig += ps[i] * Math.exp(phis[i] - phiM); | 321 sig += ps[i] * Math.pow((phis[i] - phiM), 2); |
| 322 } | 322 } |
| 323 double deviation = Math.sqrt(sig); | 323 double deviation = Math.sqrt(sig); |
| 324 return deviation; | 324 return deviation; |
| 325 } | 325 } |
| 326 | 326 |