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====== Environmental variables ======

===== Documeter (Dimensional Analysis) =====

$isEmpty == true

where $isEmpty is a property of a particular variable, read using ''getobjinfo()''

^ ^ simulator code ^ simulator image within calibrator ^
| simulator time (ts) | running forwards\\ $history == false | NA |
| historical time (th) | running backwards\\ $history == true | calibrator running forwards\\ $history == false |

===== SAMM evaluation =====

$isEmpty == false

^ ^ simulator code ^ simulator image within calibrator ^
| simulator time (ts) | "normal" evaluation\\ $history == false | NA |
| historical time (th) | eval his outs\\ $history == true | eval his ins\\ $history == false |

====== Code examples ======

In the simulator:

<code>
if $history == true
	censusCount[s,ts,a5] = cenPop[s,th,a5]
else

	censusCount[s,ts,a5] = 1 - errorRatio[s,ts,a5] * popOnCenDay5[s,ts,a5]
endif
</code>

But in the simulator image within the calibrator:

<code>
!if $history == true
	censusCount[s,ts,a5] = cenPop[s,th,a5]
!else
!
!	censusCount[s,ts,a5] = 1 - errorRatio[s,ts,a5] * popOnCenDay5[s,ts,a5]
!endif
</code>

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