Re: Extracting Terms From a List

*To*: mathgroup at smc.vnet.net*Subject*: [mg44199] Re: Extracting Terms From a List*From*: bobhanlon at aol.com (Bob Hanlon)*Date*: Sun, 26 Oct 2003 00:41:53 -0400 (EDT)*References*: <bndkar$g5s$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

lst = {3,Sqrt[2],(x+y)^2,x+y^2}; Use the optional levelspec parameter (see on-line help for Cases) Cases[lst,_Integer|_^2,2] {3, 2, 2, (x + y)^2, y^2} However, the result that you specified requires different levelspecs for the different patterns Join[Cases[lst,_Integer],Cases[lst,_^2,2]] {3, (x + y)^2, y^2} Bob Hanlon In article <bndkar$g5s$1 at smc.vnet.net>, "Bruce W. Colletti" <bcolletti at compuserve.com> wrote: << How would I cull integers and squared terms from {3, Sqrt[2], (x+y)^2, x+y^2}? The desired output is {3, (x+y)^2, y^2}. Unfortunately: Cases[{3, Sqrt[2], (x+y)^2, x+y^2}, _Integer | _^2] returns {3, (x+y)^2} . >><BR><BR>