Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/fixings/FixCalculation.java @ 2785:f87fcedbfa82
FixA: Fixed stupid index bug.
flys-artifacts/trunk@4524 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sat, 26 May 2012 19:20:59 +0000 |
parents | cbb513a8f548 |
children | f9e62e76ee1f |
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package de.intevation.flys.artifacts.model.fixings; import de.intevation.flys.artifacts.FixationArtifactAccess; import de.intevation.flys.artifacts.math.fitting.Function; import de.intevation.flys.artifacts.math.fitting.FunctionFactory; import de.intevation.flys.artifacts.model.Calculation; import de.intevation.flys.artifacts.model.CalculationResult; import de.intevation.flys.artifacts.model.FixingsColumn; import de.intevation.flys.artifacts.model.FixingsColumnFactory; import de.intevation.flys.artifacts.model.FixingsOverview; import de.intevation.flys.artifacts.model.FixingsOverviewFactory; import de.intevation.flys.artifacts.model.Parameters; import de.intevation.flys.artifacts.model.FixingsOverview.Range; import de.intevation.flys.artifacts.model.FixingsOverview.Fixing; import de.intevation.flys.artifacts.model.FixingsOverview.IdFilter; import de.intevation.flys.artifacts.model.FixingsOverview.Fixing.Filter; import de.intevation.flys.artifacts.model.FixingsOverview.AndFilter; import de.intevation.flys.artifacts.model.FixingsOverview.DateRangeFilter; import de.intevation.flys.artifacts.model.FixingsOverview.SectorRangeFilter; import de.intevation.flys.utils.DoubleUtil; import java.util.ArrayList; import java.util.List; import java.util.Date; import org.apache.commons.math.MathException; import org.apache.commons.math.optimization.fitting.CurveFitter; import org.apache.commons.math.optimization.general.LevenbergMarquardtOptimizer; import org.apache.log4j.Logger; public class FixCalculation extends Calculation { private static Logger logger = Logger.getLogger(FixCalculation.class); protected String river; protected double from; protected double to; protected double step; protected boolean preprocessing; protected String function; protected int [] events; protected long [][] analysisPeriods; protected int qSectorStart; protected int qSectorEnd; public FixCalculation() { } public FixCalculation(FixationArtifactAccess access) { String river = access.getRiver(); Double from = access.getFrom(); Double to = access.getTo(); Double step = access.getStep(); String function = access.getFunction(); int [] events = access.getEvents(); long [][] analysisPeriods = access.getAnalysisPeriods(); Integer qSectorStart = access.getQSectorStart(); Integer qSectorEnd = access.getQSectorEnd(); if (river == null) { // TODO: i18n addProblem("fix.missing.river"); } if (from == null) { // TODO: i18n addProblem("fix.missing.from"); } if (to == null) { // TODO: i18n addProblem("fix.missing.to"); } if (step == null) { // TODO: i18n addProblem("fix.missing.step"); } if (function == null) { // TODO: i18n addProblem("fix.missing.function"); } if (events == null || events.length < 1) { // TODO: i18n addProblem("fix.missing.events"); } if (analysisPeriods == null || analysisPeriods.length < 1) { // TODO: i18n addProblem("fix.missing.analysis.periods"); } if (qSectorStart == null) { // TODO: i18n addProblem("fix.missing.qstart.sector"); } if (qSectorEnd == null) { // TODO: i18n addProblem("fix.missing.qend.sector"); } if (!hasProblems()) { this.river = river; this.from = from; this.to = to; this.step = step; this.function = function; this.events = events; this.analysisPeriods = analysisPeriods; this.qSectorStart = qSectorStart; this.qSectorEnd = qSectorEnd; } } public CalculationResult calculate() { FixingsOverview overview = FixingsOverviewFactory.getOverview(river); if (overview == null) { addProblem("fix.no.overview.available"); } Function func = FunctionFactory.getInstance() .getFunction(function); if (func == null) { // TODO: i18n addProblem("fix.invalid.function.name"); } if (hasProblems()) { return new CalculationResult(this); } FixingsColumnFactory fcf = FixingsColumnFactory.getInstance(); List<FixingsColumn> dataColumns = new ArrayList<FixingsColumn>(events.length); for (int eventId: events) { IdFilter idFilter = new IdFilter(eventId); List<Fixing.Column> columns = overview.filter(null, idFilter); if (columns.isEmpty()) { // TODO: i18n addProblem("fix.missing.column", eventId); continue; } FixingsColumn dataColumn = fcf.getColumnData(columns.get(0)); if (dataColumn == null) { // TODO: i18n addProblem("fix.cannot.load.data", eventId); continue; } dataColumns.add(dataColumn); } if (dataColumns.size() < 2) { // TODO: i18n addProblem("fix.too.less.data.columns"); return new CalculationResult(this); } double [] kms = DoubleUtil.explode(from, to, step); double [] ws = new double[dataColumns.size()]; double [] qs = new double[ws.length]; String [] parameterNames = func.getParameterNames(); Parameters results = new Parameters(createColumnNames(parameterNames)); boolean invalid = false; for (int i = 0; i < kms.length; ++i) { double km = kms[i]; for (int j = 0; j < ws.length; ++j) { FixingsColumn column = dataColumns.get(j); qs[j] = column.getQ(km); boolean interpolated = column.getW(km, ws, j); // TODO: mark as interpolated. } // TODO: Do preprocessing here! double [] parameters = fit(func, km, ws, qs); if (parameters == null) { // Problems are reported already. continue; } int row = results.newRow(); results.set(row, "km", km); for (int j = 0; j < parameters.length; ++j) { if (Double.isNaN(parameters[j])) { invalid = true; } else { results.set(row, parameterNames[j], parameters[j]); } } // TODO: Calculate statistics, too! } if (invalid) { // TODO: i18n addProblem("fix.invalid.values"); results.removeNaNs(); } // Calculate Delta W/t DeltaWTsKM deltaWTsKM = calculateDeltaWTs( func, overview, results); return new CalculationResult(deltaWTsKM, this); } public DeltaWTsKM calculateDeltaWTs( Function function, FixingsOverview overview, Parameters results ) { DeltaWTsKM deltaWTsKM = new DeltaWTsKM(results.size()); Column [][] analysisColumns = getAnalysisColumns(overview); int [] parameterIndices = results.columnIndices(function.getParameterNames()); double [] parameterValues = new double[parameterIndices.length]; double [] ow = new double[1]; for (int i = 0, N = results.size(); i < N; ++i) { double km = results.get(i, "km"); results.get(i, parameterIndices, parameterValues); DeltaWTsKM.KM dwtkm = new DeltaWTsKM.KM(km); deltaWTsKM.add(dwtkm); // This is the paraterized function for a given km. de.intevation.flys.artifacts.math.Function instance = function.instantiate(parameterValues); // Evaluate all columns for all analysis periods. for (int j = 0; j < analysisColumns.length; ++j) { Column [] periodColumns = analysisColumns[j]; for (int k = 0; k < periodColumns.length; ++k) { Column pc = periodColumns[k]; // Q from real data. double q = pc.data.getQ(km); if (Double.isNaN(q)) { continue; } // Calculate W from function. double nw = instance.value(q); if (Double.isNaN(nw)) { continue; } // W from real data. pc.data.getW(km, ow); if (Double.isNaN(ow[0])) { continue; } double deltaW = ow[0] - nw; DeltaWT deltaWT = new DeltaWT( deltaW, pc.meta.getStartTime(), pc.meta.getDescription()); dwtkm.add(deltaWT); } } } return deltaWTsKM; } /** Helper class to bundle the meta information of a column * and the real data. */ protected static class Column { protected Fixing.Column meta; protected FixingsColumn data; public Column() { } public Column(Fixing.Column meta, FixingsColumn data) { this.meta = meta; this.data = data; } } // class Column /** Fetch meta and data columns for analysis periods. */ protected Column [][] getAnalysisColumns(FixingsOverview overview) { Column columns [][] = new Column[analysisPeriods.length][]; Range range = new Range(from, to); SectorRangeFilter sectorRangeFilter = new SectorRangeFilter(qSectorStart, qSectorEnd); FixingsColumnFactory fcf = FixingsColumnFactory.getInstance(); for (int i = 0; i < columns.length; ++i) { // Construct filter for period. long [] period = analysisPeriods[i]; AndFilter filter = new AndFilter(); DateRangeFilter dateRangeFilter = new DateRangeFilter( new Date(period[0]), new Date(period[1])); filter.add(dateRangeFilter); filter.add(sectorRangeFilter); List<Fixing.Column> metaCols = overview.filter(range, filter); ArrayList<Column> cols = new ArrayList<Column>(metaCols.size()); // Only use columns which have data. for (Fixing.Column meta: metaCols) { FixingsColumn data = fcf.getColumnData(meta); if (data != null) { cols.add(new Column(meta, data)); } } columns[i] = cols.toArray(new Column[cols.size()]); } return columns; } protected static String [] createColumnNames(String [] parameters) { String [] result = new String[parameters.length + 1]; result[0] = "km"; // TODO: Add statistic columns, too. System.arraycopy(parameters, 0, result, 1, parameters.length); return result; } protected double [] fit( Function function, double km, double [] ws, double [] qs ) { LevenbergMarquardtOptimizer lmo = new LevenbergMarquardtOptimizer(); CurveFitter cf = new CurveFitter(lmo); boolean missingWs = false; boolean missingQs = false; for (int i = 0; i < ws.length; ++i) { boolean ignore = false; if (Double.isNaN(ws[i])) { ignore = true; if (!missingWs) { missingWs = true; // TODO: i18n addProblem(km, "fix.missing.w"); } } if (Double.isNaN(qs[i])) { ignore = true; if (!missingQs) { missingQs = true; // TODO: i18n addProblem(km, "fix.missing.q"); } } if (!ignore) { cf.addObservedPoint(ws[i], qs[i]); } } try { return cf.fit(function, function.getInitialGuess()); } catch (MathException me) { addProblem(km, "fix.fitting.failed"); } return null; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :