Re: Problem with collect
- To: mathgroup at smc.vnet.net
- Subject: [mg6439] Re: Problem with collect
- From: hans.steffani at e-technik.tu-chemnitz.de (Hans Steffani)
- Date: Fri, 21 Mar 1997 22:59:29 -0500 (EST)
- Organization: University of Technology Chemnitz, FRG
- Sender: owner-wri-mathgroup at wolfram.com
My first posting did not state the problem completly.
Take
blah1 vv ss + blah2 vv ss +
blah3 vv aa + blah4 vv aa +
blah5 ss aa + blah6 ss aa
Collect[%,{ss vv,vv aa,ss aa}]
this produces
aa blah5 ss + aa blah6 ss + aa blah3 vv + aa blah4 vv +
blah1 ss vv + blah2 ss vv
although I want
aa vv(blah3+blah4) + ss vv(blah1+blah2) + ss aa(blah5+blah6)
Collect[%,{ss,vv,aa}]
produces
aa (blah3 + blah4) vv + ss
(aa (blah5 + blah6) + (blah1 + blah2) vv)
which is not what I want.
Hans Friedrich Steffani
--
Hans Friedrich Steffani
Institut fuer Elektrische Maschinen und Antriebe, TU Chemnitz-Zwickau
mailto:hans.steffani at e-technik.tu-chemnitz.de
http://www.tu-chemnitz.de/~hfst/