Hi! I want to convert the lines 1.1,3.19e-4 1.2,3.05e-3 10.5,9.14e8 (as example) to 1,1 & $3,19 \cdot 10^{-4}$\\ etc.. from one file and save these in a new file Rly lost here except I know I should use regexp and MAYBE sed somehow :) Thx for any help _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/