Approximated complex numbers. How I put them to zero?

[matteo.bina]

Dear all,
I'm fighting against complicated expressions which contain complex numbers that, after some calculations and simplifications, appear in a form like: 1. + 0.I. I think that this weighs down the next calculations.
The question is: how can I put zero the imaginary part? or, in general, how can I set a threshold for a number under which it must be considered as zero?
Thank you very much!

Teo

 

[CompuChip]

Looking at your notation, I suspect you are talking about Mathematica?
In that case, you could try

Chop[x]

You can also set your own threshold, with Chop[expr, delta].

 

[matteo.bina]

Ok...thank you very much!
I was absolutely convinced to have put the Mathematica reference...I've learned: never to be convinced!
Thanks again...I will try!