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Re: Default value

• To: mathgroup at smc.vnet.net
• Subject: [mg74874] Re: [mg74850] Default value
• From: Bob Hanlon <hanlonr at cox.net>
• Date: Mon, 9 Apr 2007 06:15:54 -0400 (EDT)
• Reply-to: hanlonr at cox.net

f[i_, m_] := f[i, m, i];

f[i_, m_, iv_] := ...


Bob Hanlon

---- Bruno Campanini <BC at gmail.com> wrote: 
> I have a function   f [ i_, m_, iv_ ]  and would like
> to have a default value for iv equal to i.
> 
> I neither can write   f [ i_, m_, iv_: i_ ], nor   f [ i_, m_, iv_ : i ]
> ans the error "Default value for iv_ contains a pattern" arises.
> 
> Any workaround?
> 
> Bruno
>