Re: I need some help about this error
- To: mathgroup at smc.vnet.net
- Subject: [mg39314] Re: [mg39305] I need some help about this error
- From: "milkcart" <milkcart at m17.alpha-net.ne.jp>
- Date: Tue, 11 Feb 2003 04:41:12 -0500 (EST)
- References: <200302100608.BAA23852@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Plot have property of HoldAll
In[58]:=
Attributes[Plot]
Out[58]=
{HoldAll, Protected}
So if you plot t={2x+1,-2x+3} with the next sentence,
t={2x+1,2x-3};
Plot[t,{1,2}]
error is returned. Plot uses to number 1 to evaluate "t".
But t is not a list of function, but only a letter. This happens
because of the Plot's property of HoldAll. Mathematica
regard t as a letter "t", not a list of functions {2x+1,2x-3}
You can have mathematica know "t" as a list of function,
by using Evaluate in a Plot command.
t={2x+1,2x-3};
Plot[Evaluate[t], {x,1,2}]
Help of Plot and A4.2 might be useful to you.
************
milkcart
milkcart at m17.alpha-net.ne.jp
- References:
- I need some help about this error
- From: spin9@terra.com.br (baruch)
- I need some help about this error