When using nested function calls, the unit handling for functions cannot always deduce the correct units. It is therefore recommended that you avoid using the settings in the Units column of the function features if you make nested function calls.
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The entries in the Function name column must occur in the Functions table, and the entries in the Argument column must occur among the arguments listed for that function in the Function table.
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The Partial derivative column contains expressions for the partial derivatives. Partial derivatives that are not specified in the table default to 0.
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Note that smoothing affects for which values of the arguments the function is different from zero. In particular, when applying smoothing to a Ramp or Step function, it starts to rise before the position specified in the Location field. This behavior may interfere with initialization assuming that the function is zero at this point.
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