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The example below uses coefficientSetFunctions (available since build 30246, i.e. since stable build 2011.01). Here 'X' is a reference to a variable and 'a', 'b' and 'c' are references to coefficients. Here the coefficients are defined in coefficientSetFunctions, where @coef_a@, @coef_b@ and @coef_c@ refer to location number attributes that are defined in the locationSets configuration file.
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