Aggregation
Basic and
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Aggregated series
The original series. , i.e. the series to be aggregated, is called basic series. The series with the aggregates is called the aggregated series.
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1. for instantaneous observations the aggregated data are averages of the originals, e.g. discharges in m^3^ m3/s.
2. for accumulative observations the aggregated data are the sums of the originals, e.g. rainfall or runoff in mm.
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- for instantaneous observations:
Y~j~ Yj = (1/n)(10 X~1X1,j~ j + 10 X~2X2,j~ j + (n-20) X~3X3,j~ j ) - for accumulative observations:
Y~j~ Yj = X~1X1,j~ j + X~2X2,j~ j + X~3X3,j~ j
where:
X~i Xi,j~ j = i-th decade of month j
Y~j~ Yj = j-th month
n = number of days in month j
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- Select one or more basic series from the Series Codes list.
- Select time intervals of aggregated series where Dt~basic~ Δtbasic < Dt~aggregated~Δtaggregated
- Press <Execute> to execute the aggregation.
The newly aggregated series can be shown in a
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graph,
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viewed within the spreadsheet viewer,
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saved to the database or
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exported.