Re: Select from list
- To: mathgroup at smc.vnet.net
- Subject: [mg61082] Re: [mg61045] Select from list
- From: Igor Antonio <igora at wolf-ram.com>
- Date: Sun, 9 Oct 2005 01:36:26 -0400 (EDT)
- Organization: Wolfram Research, Inc.
- References: <200510080649.CAA20981@smc.vnet.net>
- Reply-to: igora at wolf-ram.com
- Sender: owner-wri-mathgroup at wolfram.com
Steven Taracevicz wrote: > hi: > > I read a text file that gives me a list. > nLevel[8, 10] = Import["output8_10.txt", "List"] > > {-10,-9,-7,-3,1,3,3,17} > > I have no problems calculating mean, variance etc. with the list. > > When I use: > > Select[nLevel[8,10], #<0] > > yields > > {} > > despite negative elements. > > I cannot figure out why. > > Thanks, > Steven, Your syntax is incorrect. The second argument of Select needs to be a *function* (either built-in or a pure funtion). Note the "&" you're missing. In[2]:= Select[{-10,-9,-7,-3,1,3,3,17}, (#<0)&] Out[2]= {-10,-9,-7,-3} -- Igor C. Antonio Wolfram Research, Inc. http://www.wolfram.com To email me personally, remove the dash.
- References:
- Select from list
- From: "Steven Taracevicz" <sftara@starshooter.com>
- Select from list