time_series_range.cpp

Example for RDM::TIME_SERIES template classes. This example needs a compiled schema, time_series_range.sdl.

This example shows usage of the RDM::TIME_SERIES template classes with a single chain. First, values are collected into ranges by the RDM::TIME_SERIES::collect class, then a number of ranges are averaged using the RDM::TIME_SERIES::geometric_mean class, and finally rows are inserted using the RDM::TIME_SERIES::insert_row class.

#include <math.h>
#include "rdmtimeseries.h"
#include "time_series_range_structs.h"

static RDM_RETCODE timeSeriesRange (RDM_DB db)
{
    RDM_RETCODE rc;
    using namespace RDM_CPP::TIME_SERIES_RANGE;
    using namespace RDM::TIME_SERIES;

    const double tau = 6.283185307179586;
    collect <16, MEASUREMENT_RANGE,
             geometric_mean <16, MEASUREMENT_RANGE, double,
                             insert_row <TABLE_MEASUREMENT_RANGE>>> ts_chain;

    double factor = 1.0442737824;
    double adjust = 1.0;

    rc = ts_chain.init (db);
    for (uint64_t time_stamp = 0; rc == sOKAY && time_stamp < 256; time_stamp++)
    {
        const double signal = adjust * (sin (tau * time_stamp / 16) * 0.1 + 1);
        MEASUREMENT measurement = {time_stamp, signal};

        rc = ts_chain.put_value (&measurement);

        adjust *= factor;
    }

    return rc;
}