Re: Count
- To: mathgroup at smc.vnet.net
- Subject: [mg47349] Re: Count
- From: "Peter Pein" <petsie at arcor.de>
- Date: Tue, 6 Apr 2004 06:36:34 -0400 (EDT)
- References: <c4re7c$mhs$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"paolo " <tarpanelli at libero.it> schrieb im Newsbeitrag news:c4re7c$mhs$1 at smc.vnet.net... > if i have a time serie, how can i Count the elements of this time serie that are within a defined range > Example: > > x={1,1.023,1.056,2.45,5.67,....} > > how can i Count the elements inside the range (1,3)? > > thanks > > Paolo In[2]:= Count[x, a_ /; 1 < a < 3] Out[2]= 3 In[3]:= Select[x, 1 < # < 3 &] // Length Out[3]= 3 In[4]:= Plus @@ (If[1 < # < 3, 1, 0] & /@ x) Out[4]= 3 In[5]:= Plus @@ (Im[Log[(# - 1)(# - 3)]] & /@ x)/Pi Out[5]= 3. -- Peter Pein, Berlin for not being filtered, start the subject with [ ...and don't mention viagara-falls ;-)