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Note that corrections are made for an unequal number of basic time units; for example when decade data are aggregated to monthly series.

Section
  • for instantaneous observations:
    Yj = (1/n)(10 X1,j + 10 X2,j + (n-20) X3,j )
 
Section
  • for accumulative observations:
    Yj = X1,j + X2,j + X3,j

where:
Section
Column
width4%

Xi,j
Yj
n

Column
width96%

i-th decade of month j
j-th month
number of days in month j


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If in an aggregate one or more basic series elements are missing, the aggregate will by default also become a missing value. When the 'Ignore Missing Value' checkbox is checked, the missing values will be ignored.

Value of

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First Time Step

When 'Value of first time step' is checked the aggregation values will be taken as the first value of the new time step When, for example, daily values are aggregated to monthly values, the aggregated monthly values will be equal to the first value of each month.

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