Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/utils/DoubleUtil.java @ 8581:073ea4bcea58
(issue1755) Interpolate BedQuality Results
This adds an interpolation function to each various bedQuality result class.
Imho this is ok as the interpolation function can be seen as part of the result.
The interpolation function is initalized on first use and can be accessed through
get.*Interpol functions.
| author | Andre Heinecke <andre.heinecke@intevation.de> |
|---|---|
| date | Mon, 16 Mar 2015 15:36:38 +0100 |
| parents | e4606eae8ea5 |
| children | 07c9ac22f611 |
comparison
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| 8580:d9f038b8e2ce | 8581:073ea4bcea58 |
|---|---|
| 7 */ | 7 */ |
| 8 | 8 |
| 9 package org.dive4elements.river.utils; | 9 package org.dive4elements.river.utils; |
| 10 | 10 |
| 11 import org.dive4elements.river.artifacts.math.Linear; | 11 import org.dive4elements.river.artifacts.math.Linear; |
| 12 | |
| 13 import org.apache.commons.math.analysis.interpolation.LinearInterpolator; | |
| 14 import org.apache.commons.math.analysis.polynomials.PolynomialSplineFunction; | |
| 15 | |
| 16 import org.apache.commons.math.exception.DimensionMismatchException; | |
| 17 import org.apache.commons.math.exception.NumberIsTooSmallException; | |
| 18 import org.apache.commons.math.exception.NonMonotonousSequenceException; | |
| 12 | 19 |
| 13 import gnu.trove.TDoubleArrayList; | 20 import gnu.trove.TDoubleArrayList; |
| 14 | 21 |
| 15 import java.util.Arrays; | 22 import java.util.Arrays; |
| 16 import java.util.Comparator; | 23 import java.util.Comparator; |
| 303 for (int i = 0; i < A; ++i) { | 310 for (int i = 0; i < A; ++i) { |
| 304 arrays[i].remove(dest, N-dest); | 311 arrays[i].remove(dest, N-dest); |
| 305 } | 312 } |
| 306 } | 313 } |
| 307 } | 314 } |
| 315 | |
| 316 /** Convieniance function for results to get an interpolator. | |
| 317 * This is basically a static wrapper to for LinearInterpolator.interpolate | |
| 318 * with error handling. Returns null on error.*/ | |
| 319 public static PolynomialSplineFunction getLinearInterpolator(TDoubleArrayList x, TDoubleArrayList y) { | |
| 320 LinearInterpolator lpol = new LinearInterpolator(); | |
| 321 try { | |
| 322 return lpol.interpolate(x.toNativeArray(), y.toNativeArray()); | |
| 323 } catch (DimensionMismatchException e) { | |
| 324 log.error("KMs and Result values have different sizes. Failed to interpolate: " + | |
| 325 e.getMessage()); | |
| 326 } catch (NonMonotonousSequenceException e) { | |
| 327 log.error("KMs are not monotonous. Failed to interpolate: " + e.getMessage()); | |
| 328 } catch (NumberIsTooSmallException e) { | |
| 329 log.error("Result is to small. Failed to interpolate: " + e.getMessage()); | |
| 330 } | |
| 331 return null; | |
| 332 } | |
| 308 } | 333 } |
| 309 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : | 334 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |