Calculation in a list

Depending on the expression needed the list based transformers can be used. Although the possibilities are not great  certain statistics and simple expressions can be done .

For example a simple one, like multiply by 2 the ATTR_1 on all elements of the list.

 

 

I would use PythonCaller when it's desirable to avoid list explosion.

 

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# Python Example

 

# Assume every list element can be interpreted as numeric value.

 

import fmeobjects

 

def multiplyBy2(feature):

 

    for i, value in enumerate(feature.getAttribute('MyList{}')):

 

        feature.setAttribute('MyList{%d}' % i, float(value) * 2)

 

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