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How to add random numbers to an existing data frame for Validation

Susanne Osterkamp 
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Hello everybody,

I would like to validate my data for working with CART
I need to now how to randomize eithter the ID column in my already existing data frame or how to create a randomized column of some 6800 intgers to fit it to my data frame. I did not understand the manual concerning the possibilities to random data, sorry.
Thanks a lot for your help!

Susanne Osterkamp
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Susanne Osterkamp How to add random numbers to an existing data frame for Validation Aug 18 Tim Keitt How to add random numbers to an existing data frame for Validation Aug 19