This calculates the sum of values for a series for each half calendar year within the display period. Half calendar years runs from 1 January to 30 June and 1 July to 31 December.
CHS#(Expression,Carry Indicator,Display Indicator)
Where the optional Carry Indicator can be:
D Default; carry previous value, but not between periods
C Carry previous value
I Ignore
N N/A is displayed when there is a null value in the series
Display Indicator - the default is to display values only for complete periods, however the following optional parameters exists -
P Values calculated for incomplete calendar periods at the start of the display period
R Values calculated for incomplete calendar periods at the start and end of the display
CHS#(SAGLDOUTH)
This calculates the output (in kilograms) of South African gold production for each full calendar year within the display period.
The N parameter is not currently supported by the web Expression Builder in DFO / Datastream Charting, and the function is only accepted in the AFO Expression Builder if the Carry Indicator and Display Indicator are included within the expression. The function is however fully supported when used directly in AFO or DFO requests, and a line will be plotted successfully in Datastream Charting.