Spotfire Ideas Portal
When an optional parameter is used, I have to test in the data function whether the parameter is set using is.null() and assign it a default value. e.g.
if(is.null(optPar)) {optPar = "something}
because otherwise the code usually fails because you cannot do lots of operations sensibly with null values, like comparisons.
This is not a big deal, but if would be nice to have the possibility to assign a default value for optional parameters in case they are set to None in the data function parameters dialog. That way, one could avoid the code as stated above.