RE: Extracting Terms From a List
- To: mathgroup at smc.vnet.net
- Subject: [mg44203] RE: [mg44183] Extracting Terms From a List
- From: "David Park" <djmp at earthlink.net>
- Date: Sun, 26 Oct 2003 00:41:57 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Bruce, You almost got it. All you have to do is add a level specification as a last argument to the Cases statement. Cases[{3, Sqrt[2], (x + y)^2, x + y^2}, _Integer | _^2, Infinity] {3, 2, 2, (x + y)^2, 2, y^2} Without the level specification, Mathematica only looks at the first level of the expression. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Bruce W. Colletti [mailto:bcolletti at compuserve.com] To: mathgroup at smc.vnet.net 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} . Thankx. Bruce