Examples of org.geotools.math.Statistics

org.geotools.math.Statistics
pute some data values here...) Statistics stats = new Statistics(); for (int i=0; i<data.length; i++) { stats.add(data[i]); } System.out.println(stats); @since 2.0 @source $URL$ @version $Id$ @author Martin Desruisseaux (IRD)

     *
     * @throws FactoryException If the math transform can't be created or used.
     */
    public Statistics getErrorStatistics() throws FactoryException {
        final MathTransform  mt     = getMathTransform();
        final Statistics     stats  = new Statistics();
        final DirectPosition buffer = new GeneralDirectPosition(getDimension());
        for (final Iterator <MappedPosition> it=getMappedPositions().iterator(); it.hasNext();) {
            final MappedPosition mp = (MappedPosition) it.next();
            /*
             * Transforms the source point using the math transform calculated by this class.
             * If the transform can't be applied, then we consider this failure as if it was
             * a factory error rather than a transformation error. This simplify the exception
             * declaration, but also has some sense on a conceptual point of view. We are
             * transforming the exact same points than the one used for creating the math
             * transform. If one of those points can't be transformed, then there is probably
             * something wrong with the transform we just created.
             */
            final double error;
            try {
                error = mp.getError(mt, buffer);
            } catch (TransformException e) {
                throw new FactoryException(Errors.format(ErrorKeys.CANT_TRANSFORM_VALID_POINTS), e);
            }
            stats.add(error);
        }
        return stats;
    }

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            if(success) {
                double millis = ((double) System.nanoTime() - start) / 1000000;
                Name name = WFSNotify.getTypeName(feature);
                serializationMillis.add(millis);
                serializationChars.add(sw.getBuilder().length());
                Statistics statsByType = serializationMillisByType.get(name);
                if(statsByType == null) {
                    Statistics newStats = new Statistics();
                    statsByType = serializationMillisByType.put(name, newStats);
                    if(statsByType == null) {
                        statsByType = newStats;
                    }
                }

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    }


    @Override
    public void resetStats() {
        serializationMillisByType = new ConcurrentHashMap<Name, Statistics>();
        serializationMillis = new Statistics();
        serializationChars = new Statistics();
        failures = new AtomicLong();
        updates = new AtomicLong();
        deletes = new AtomicLong();
        lastFailure = null;
    }

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    @Override
    public String createSerializationTimeHistogram() {
        StringBuilder sb = new StringBuilder();
        sb.append("<table><thead><tr><td>Type name</td><td>Count</td><td>Min</td><td>Max</td><td>Avg</td><td>Total</td></tr></thead>");
        for(Entry<Name, Statistics> e : serializationMillisByType.entrySet()) {
            Statistics st = e.getValue();
            sb.append("<tr><td>").append(e.getKey()).append("</td><td>").append(st.count()).append("</td><td>")
                .append(st.minimum()).append("</td><td>").append(st.maximum()).append("</td><td>").append(st.mean())
                .append("</td><td>").append(st.mean()*st.count()).append("</td></tr>");
        }
        sb.append("</table>");
        return sb.toString();
    }

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Related Classes of org.geotools.math.Statistics

org.geoserver.wfs.notification.GMLNotificationSerializer

org.geotools.io.TableWriter

org.geotools.referencing.operation.builder.MathTransformBuilder

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