Go back to previous page
Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: College math
Topic ID: 562
Message ID: 6
#6, RE: spectral analysis question
Posted by alexb on Mar-12-06 at 05:57 PM
In response to message #5
>1. Why the manual example does not show the phantom
>frequencies?

Ah, I understand. They dropped the right part of the positive interval because it would show the phantom frequencies inherited from the negative domain.

>2. You wrote "However, because of the way MatLab is set up,
>it likes to use vectors that are indexed by nonnegative
>integers, so the period that is chosen is from 0 to N-1." If
>it's not an idiosyncrasy then what is?