Path: news.mathworks.com!not-for-mail From: "John D'Errico" <woodchips@rochester.rr.com> Newsgroups: comp.soft-sys.matlab Subject: Re: how do you find adjacent numbers fast? Date: Wed, 23 Jun 2010 19:52:21 +0000 (UTC) Organization: John D'Errico (1-3LEW5R) Lines: 28 Message-ID: <hvtolk$5lq$1@fred.mathworks.com> References: <57dc7fe3-2b8b-4ed7-870c-b73c87ae24d4@a3g2000vbl.googlegroups.com> Reply-To: "John D'Errico" <woodchips@rochester.rr.com> NNTP-Posting-Host: webapp-03-blr.mathworks.com Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: fred.mathworks.com 1277322741 5818 172.30.248.38 (23 Jun 2010 19:52:21 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Wed, 23 Jun 2010 19:52:21 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 869215 Xref: news.mathworks.com comp.soft-sys.matlab:647535 Luna Moon <lunamoonmoon@gmail.com> wrote in message <57dc7fe3-2b8b-4ed7-870c-b73c87ae24d4@a3g2000vbl.googlegroups.com>... > Here is the number I want to find, let's call it x, > > here is the big vector, let me call it A, > > I want to find the number x in A, in a fuzzy way. > > Lets do an example: x=3, A=[0, 1, 2, 3, 4, 5], > then I want to identify the target location to be position 4. > > Another example: > x=3, A=[0, 2, 4, 6, 8], > then I want to identify the target locations to be positions 2 and 3, > (i.e. the immediate location right before the placehold that x should > be in, and one immediately after...) > i.e. x=3 should have been in between 2 and 3, since we couldn't find > it in the vector > > A is an ordered vector... not a set... > > How to do that? You won't believe me. People never do on this matter. But the second return argument from histc does exactly this. HTH, John