Defining an UpValue for a specific List?
- To: mathgroup at smc.vnet.net
- Subject: [mg23153] Defining an UpValue for a specific List?
- From: Claudius Schnorr <schnoerr at mailzone.com>
- Date: Thu, 20 Apr 2000 03:21:20 -0400 (EDT)
- Organization: T-Online
- Sender: owner-wri-mathgroup at wolfram.com
Hello,
I would like to make the following definition:
df[[a_, b_]] ^:= DFPart[df, a_, b_]
where df is a list of three components.
I get the folowing error:
UpSetDelayed::write: Tag List in {<<l>>}[[a_,b_]] is Protected.
Is there a possibility to redefine Part[] for some symbols?
Please email directly to
schnoerr at mailzone.com
Thank you very much!
Claudius
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