Deleting expressions containing a certain head
- To: mathgroup at smc.vnet.net
- Subject: [mg125994] Deleting expressions containing a certain head
- From: Brentt <brenttnewman at gmail.com>
- Date: Wed, 11 Apr 2012 18:22:13 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
Hello, I have a list of expressions, and I am trying to use DeleteCases to delete expressions in the list which contain a certain head *anywhere* in the expression. Setting the levelspec for DeleteCases to Infinity almost works, except I want to delete the entire expression containing the head from the list as opposed to just the head itself while leaving the rest of the expression in the list. e.g. I want this DeleteCases[{2^(Complex[2,3])+3 , 2 ,3x }, Complex[_,_], Infinity ] to output this {2,3x} Getting rid of any expression that has a complex number in it. How does one go about this?
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- From: Bob Hanlon <hanlonr357@gmail.com>
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