set total [objarray sum <obj>]
Return a single value with the summatory reduction of all array items
e.g.
set obj [objarray new doublearray -values {3.5 2.1 0.3 3.5 2.6 0.3}]
-> 3.5 2.1 0.3 3.5 2.6 0.3
objarray sum $obj
-> 12.299999999999999
GiD - The personal pre and post processor
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