
Re: Finding position in array
Posted:
Jun 6, 2014 2:11 PM


dpb <none@non.net> wrote in message <lmsth7$ekd$1@speranza.aioe.org>... > On 6/6/2014 12:03 PM, Bruno Luong wrote: > >> > >> Yet another approach somewhat akin to Bruno's... > >> > >> >> interp1(a,1:length(a),x,'nearest') > >> ans = > >> 3 > > > > Not completely equivalent, INTERP1 will has the resulting index jumps by > > 1 unit when passing the middle point of the EDGES, whereas HISTC jumps > > right at the EDGES. > > Didn't say it was equivalent; only that it is "_somewhat_ akin to"...
You should point out the difference, otherwise it can be missleading for OP.
> > > INTERP1 and HISTC methods can deal with x as vector (not FIND()). > > But FIND() returns the specific preceding/following index value > depending on the usage if that's significant. The vector of lookup > values is easily dealt with via ARRAYFUN
IMO ARRAYFUN is a poor choice when speed is important for large array of x. I often prefer forloop compared to ARRAYFUN.
Bruno

