At 10:11 12/7/2005, allan_sta_staff_sci_main_uct at mail.uct.ac.za wrote: >hi all > >why does R do this: > >(-8)^(1/3)=NaN > >the answer should be : -2 Allan In my computer: > (-8)^(1/3) [1] NaN > -8^(1/3) [1] -2 > -(8^(1/3)) [1] -2 The problem is -8 or the problem is (-8) ? []s Tura -- No virus found in this outgoing message. Checked by AVG Anti-Virus.