Determining value for parameter

TimTrick

Please Help Me. I am stuck.

I have a general decision tree and also CHAID and ID-3.

The parameters are

- minimal size for split
- minimal leaf size
- minimal gain
- maximal depth
- confidence

My training data is 400.
Ny features are 6707
My amount of total text is 27910

How can I determine a good value for the parameter without testruns. Testruns would take too much time due to the high enourmous amount of data.
Who has an idea for me?

Thank you!!!