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How to use ?use in cdfCreateParam

RVERP

I want to rule out one of the choices in cdfCreateParam.

I suppose ?use is what is need, but how do I use it?

  • Andrew Beckett

    By "rule out" do you mean "not display"? If so, the ?display callback is probably the best choice - then specify ?display "nil". The ?use setting isn't really used consistently, so I'm not entirely certain whether it's useful or not...

    Regards,

    Andrew.

  • RVERP
    in reply to Andrew Beckett

    Sorry, I wasn't very clear. It's a radio field I'm creating. I want to rule out one of the options, depending on other parameters. Is this possible?

  • Andrew Beckett
    in reply to RVERP

    Not by doing it this way. You can have a callback which updates the choices on the fly though. See Unable to change choices of a cyclic CDF parameter through callback (the article title reflects that it wasn't possible in the past).

    However, from a quick check, it seems that you can only change the choices for cyclic fields, not radio fields. 

    So for a radio field it's not possible at all.

    Andrew.

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