
Re: Finding position in array
Posted:
Jun 6, 2014 4:06 AM


dpb <none@non.net> wrote in message <lmrh01$m1u$1@speranza.aioe.org>... > On 6/5/2014 6:04 PM, Sepp wrote: > > Hi > > > > I have an array of real numbers, let's say e.g. > > > > a = [1.23, 3.5, 6, 23.54, 44.234, 60.8]; > > > > The array is sorted in ascending order. > > > > Now I have a new value, let's say 8.54 and I want to find the position > > in the array a. The position would be after element 6 and before element > > 23.54. I.e. I should somehow retrieve the index position 3 > > (corresponding to 6) or 4 (corresponding to 23.54). > > > > How can I do that efficiently in Matlab? I tried out the find method but > > it doesn't work. > > Of course it works... > > >> a = [1.23, 3.5, 6, 23.54, 44.234, 60.8]; > >> x=8.54; > >> find(x<a,1,'first') > ans = > 4 > >> find(x>a,1,'last') > ans = > 3 > >> > > 
Thank you very much. Both approaches works.

