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| /** \ingroup core | ||
| * \class QgsStatisticalSummary | ||
| * \brief Calculator for summary statistics for a list of doubles. | ||
| * | ||
| * Statistics are calculated by calling @link calculate @endlink and passing a list of doubles. The | ||
| * individual statistics can then be retrieved using the associated methods. Note that not all statistics | ||
| * are calculated by default. Statistics which require slower computations are only calculated by | ||
| * specifying the statistic in the constructor or via @link setStatistics @endlink. | ||
| * | ||
| * \note Added in version 2.9 | ||
| */ | ||
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| class QgsStatisticalSummary | ||
| { | ||
| %TypeHeaderCode | ||
| #include <qgsstatisticalsummary.h> | ||
| %End | ||
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| public: | ||
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| //! Enumeration of flags that specify statistics to be calculated | ||
| enum Statistic | ||
| { | ||
| Count, //!< Count | ||
| Sum, //!< Sum of values | ||
| Mean, //!< Mean of values | ||
| Median, //!< Median of values | ||
| StDev, //!< Standard deviation of values | ||
| StDevSample, //!< Sample standard deviation of values | ||
| Min, //!< Min of values | ||
| Max, //!< Max of values | ||
| Range, //!< Range of values (max - min) | ||
| Minority, //!< Minority of values | ||
| Majority, //!< Majority of values | ||
| Variety, //!< Variety (count of distinct) values | ||
| FirstQuartile, //!< First quartile | ||
| ThirdQuartile, //!< Third quartile | ||
| InterQuartileRange, //!< Inter quartile range (IQR) | ||
| All | ||
| }; | ||
| typedef QFlags<QgsStatisticalSummary::Statistic> Statistics; | ||
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| /** Constructor for QgsStatisticalSummary | ||
| * @param stats flags for statistics to calculate | ||
| */ | ||
| QgsStatisticalSummary( QgsStatisticalSummary::Statistics stats = QgsStatisticalSummary::Statistics( 0 ) ); | ||
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| virtual ~QgsStatisticalSummary(); | ||
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| /** Returns flags which specify which statistics will be calculated. Some statistics | ||
| * are always calculated (eg sum, min and max). | ||
| * @see setStatistics | ||
| */ | ||
| QgsStatisticalSummary::Statistics statistics() const; | ||
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| /** Sets flags which specify which statistics will be calculated. Some statistics | ||
| * are always calculated (eg sum, min and max). | ||
| * @param stats flags for statistics to calculate | ||
| * @see statistics | ||
| */ | ||
| void setStatistics( QgsStatisticalSummary::Statistics stats ); | ||
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| /** Resets the calculated values | ||
| */ | ||
| void reset(); | ||
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| /** Calculates summary statistics for a list of values | ||
| * @param values list of doubles | ||
| */ | ||
| void calculate( const QList<double>& values ); | ||
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| /** Returns calculated count of values | ||
| */ | ||
| int count() const; | ||
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| /** Returns calculated sum of values | ||
| */ | ||
| double sum() const; | ||
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| /** Returns calculated mean of values | ||
| */ | ||
| double mean() const; | ||
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| /** Returns calculated median of values. This is only calculated if Statistic::Median has | ||
| * been specified in the constructor or via setStatistics. | ||
| */ | ||
| double median() const; | ||
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| /** Returns calculated minimum from values. | ||
| */ | ||
| double min() const; | ||
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| /** Returns calculated maximum from values. | ||
| */ | ||
| double max() const; | ||
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| /** Returns calculated range (difference between maximum and minimum values). | ||
| */ | ||
| double range() const; | ||
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| /** Returns population standard deviation. This is only calculated if Statistic::StDev has | ||
| * been specified in the constructor or via setStatistics. | ||
| * @see sampleStDev | ||
| */ | ||
| double stDev() const; | ||
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| /** Returns sample standard deviation. This is only calculated if Statistic::StDev has | ||
| * been specified in the constructor or via setStatistics. | ||
| * @see stDev | ||
| */ | ||
| double sampleStDev() const; | ||
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| /** Returns variety of values. The variety is the count of unique values from the list. | ||
| * This is only calculated if Statistic::Variety has been specified in the constructor | ||
| * or via setStatistics. | ||
| */ | ||
| int variety() const; | ||
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| /** Returns minority of values. The minority is the value with least occurances in the list | ||
| * This is only calculated if Statistic::Minority has been specified in the constructor | ||
| * or via setStatistics. | ||
| * @see majority | ||
| */ | ||
| double minority() const; | ||
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| /** Returns majority of values. The majority is the value with most occurances in the list | ||
| * This is only calculated if Statistic::Majority has been specified in the constructor | ||
| * or via setStatistics. | ||
| * @see minority | ||
| */ | ||
| double majority() const; | ||
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| /** Returns the first quartile of the values. The quartile is calculated using the | ||
| * "Tukey's hinges" method. | ||
| * @see thirdQuartile | ||
| * @see interQuartileRange | ||
| */ | ||
| double firstQuartile() const; | ||
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| /** Returns the third quartile of the values. The quartile is calculated using the | ||
| * "Tukey's hinges" method. | ||
| * @see firstQuartile | ||
| * @see interQuartileRange | ||
| */ | ||
| double thirdQuartile() const; | ||
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| /** Returns the inter quartile range of the values. The quartiles are calculated using the | ||
| * "Tukey's hinges" method. | ||
| * @see firstQuartile | ||
| * @see thirdQuartile | ||
| */ | ||
| double interQuartileRange() const; | ||
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| }; | ||
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| QFlags<QgsStatisticalSummary::Statistic> operator|(QgsStatisticalSummary::Statistic f1, QFlags<QgsStatisticalSummary::Statistic> f2); | ||
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