#ifndef GTL_MATH_VAR_H
#define GTL_MATH_VAR_H

#include "gtl_math_analog_value.h"
#include "math_global.h"

namespace gtl {
    namespace math {

        class MATH_EXPORT var : public analog_value
        {
            Q_OBJECT
        public:
            var(gtl::analog_data *data);

        protected:
            void before_copying_data(std::vector<qreal>::iterator begin, std::vector<qreal>::iterator end) override;
            void after_copying_data(std::vector<qreal>::iterator begin, std::vector<qreal>::iterator end) override;

        protected slots:
            void data_changed() override;

        private:
            qreal variance(std::vector<qreal>::iterator begin, std::vector<qreal>::iterator end);

            qreal _variance;
        };

    } // namespace math
} // namespace gtl

#endif // GTL_MATH_VAR_H