using parameters in default formula for another parameter in Pentaho report Designer -

I have two criteria defined in the Pattaho report, these are both dates, the end date is some example that the user chooses. 2012-07-09 (9 July 2012). Other parameters (start date) is hidden and this is considered to be end date 6, so that on July 3, 2012. Is there a way, I can pass the end date in the start date parameter and use it the default formula value.

I thank you in advance.

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Yes define first date, and then for start date In the default value, you can mention [enddate] in your formula, where you want to subtract 6.

The important thing is that the interval first, the beginning of the hidden beginning date.