Re: Re: Don't understand Plot behavior

*To*: mathgroup at smc.vnet.net*Subject*: [mg40084] Re: [mg40071] Re: Don't understand Plot behavior*From*: Dr Bob <drbob at bigfoot.com>*Date*: Wed, 19 Mar 2003 03:22:58 -0500 (EST)*References*: <b4pf6u$bu4$1@smc.vnet.net> <200303140945.EAA18797@smc.vnet.net> <b4ubb9$qkl$1@smc.vnet.net> <200303181050.FAA15646@smc.vnet.net>*Reply-to*: drbob at bigfoot.com*Sender*: owner-wri-mathgroup at wolfram.com

In this statement, Plot is wrapped around Evaluate, so Evaluate takes effect (regardless of what its argument might be -- what it is "wrapped around"): Plot[Evaluate[{f[t],0}] , {t, 0, 1}] In this statement, List is wrapped around Evaluate, so Evaluate doesn't take effect. Again, it doesn't matter what Evaluate is wrapped around: Plot[{Evaluate[f[t]],0} , {t, 0, 1}] What matters is what is wrapped around Evaluate, not what Evaluate is wrapped around. Bobby On Tue, 18 Mar 2003 05:50:24 -0500 (EST), Jens-Peer Kuska <kuska at informatik.uni-leipzig.de> wrote: > Hi, > > it has exactly to do with "where is Evaluate[] wrapped around" > > Because it does not appear "directly as the head of the function > argument" > > Regards > Jens > > Dr Bob wrote: >> >> It has nothing to do with what Evaluate is wrapped around. From Help: >> >> "Evaluate only overrides HoldFirst, etc. attributes when it appears >> directly as the head of the function argument that would otherwise be >> held." >> >> Plot has attribute HoldAll, and List does not. >> >> Bobby >> >> On Fri, 14 Mar 2003 04:45:35 -0500 (EST), Jens-Peer Kuska >> <kuska at informatik.uni-leipzig.de> wrote: >> >> > Hi, >> > >> > yes because Evaluate[] work only if it is >> > waraped arround a function argument or a >> > sequence of arguments, and you have to write >> > >> > Plot[Evaluate[{f[t],0}] , {t, 0, 1}] >> > >> > otherwise the List[] argument is evaluatet that >> > help Plot[] nothing. >> > >> > Regards >> > Jens > > -- majort at cox-internet.com Bobby R. Treat

**References**:**Re: Don't understand Plot behavior***From:*Jens-Peer Kuska <kuska@informatik.uni-leipzig.de>

**Re: Don't understand Plot behavior***From:*Jens-Peer Kuska <kuska@informatik.uni-leipzig.de>