Question
Cannot get value from ExpressionEvaluator
Hi, I'm creating an attribute using Expression Evaluator, after setting the destination attribute, I put 0.75*(1-(@Value(Dis)/500)^2) in the expression, however, it gives me 0.75*(1-(266.970729596956/500)^2) at the end. Anyone know what should I do with it? Thanks!
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Hi,
The ^ operator determines "bitwise exclusive OR"; it requires integer operands for both left and right. Since the left operand was not integer, your expression was not performed.
I suppose you are going to perform "exponentiation", rather than "bitwise exclusive OR". If so, you should use the ** operator or the @pow function.
See here to learn more about math operators and math functions.
Math Operators (http://docs.safe.com/fme/html/FME_Transformers/FME_Transformers.htm#transformer_parameters/math_operators.htm)
Math Functions (http://docs.safe.com/fme/html/FME_Transformers/FME_Transformers.htm#transformer_parameters/math_functions.htm)
Note the math functions list contains some new functions added in FME 2015, which cannot be used in FME 2014 or earlier.
Takashi
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