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--- howtos:toolcoding:multiple_scenario_display_views [2011/02/11 22:01]
marcus.williams created
+++ howtos:toolcoding:multiple_scenario_display_views [2011/02/15 21:27] (current)
marcus.williams
@@ Line 1: / Line 1: @@
-Here we go.
+Display views - read-only views which manipulate and present scenario data, and can be though of as reporting scripts - are generally most useful when they support multiple scenarios for comparison alongside each another.
+Below is an example of a simple multi-scenario display view which calculates average energy intensities across states. Note the use of:
+  * ''localview'' objects, which are arrays of tool objects. These are analogous to ''local'' object declarations in single-scenario views - but these are declared before the ''$numScns'' for loop.
+  * ''$numScns'' is an environmental variable, which as its name implies, lists the number of scenarios selected (including the history)
+<code>
+view energyUsed[st,ind,ts][]
+view GDP[st,ind,ts][]
+boolean $answer
+if $history == false
+	say ("This view requires a history.")
+	listen ("                              enter to continue >> ",$answer)
+	quit (-1)
+endif
+localview energyUsed_T[ind,ts][]
+localview GDP_T[ind,ts][]
+localview energyInt[ind,ts][]
+say ("working on")
+integer $i
+for $i from 1 upto $numScns
+	say ("  ", $scnDescs[$i])
+	energyUsed_T[ind,ts][$i] = sum (energyUsed[st,ind,ts][$i]; dim=state)
+	GDP_T[ind,ts][$i] = sum (energyUsed[st,ind,ts][$i]; dim=state)
+	energyInt[ind,ts][$i] = energyUsed_T[ind,ts][$i] / GDP_T[ind,ts][$i]
+endfor
+graph (energyInt[ind,ts][all]; \
+	window1=$numScns, \
+	objColours=$scnColours[all], \
+	title1="Average energy intensity in BTU/$")
+</code>

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