Thanks Tim and Roman for your help I'll try [+ 1e-006] On Mar 25, 2006, at 7:30 PM, Tim Blechmann wrote: >> 1.4 - int(1.4) = something like 0.39999999999999999999999999999 >> is this the way pd calculate? > > i guess, you want to write 1.4 - int(1) ... actually i wanted to express [1.4( | [int]