Re: Why doesn't this work ?
- To: mathgroup@smc.vnet.net
- Subject: [mg10411] Re: Why doesn't this work ?
- From: Julian Stoev <stoev@SPAM-RE-MO-VER-usa.net>
- Date: Tue, 13 Jan 1998 02:07:15 -0500
- Organization: Seoul National University, Republic of Korea
- References: <69cole$ep5@smc.vnet.net>
On 12 Jan 1998, Andreas Keese wrote:
|But why doesn't it work with more than one functions ? |
| Clear[S2];
| S2={Sin[x],Cos[x]};
| Plot[S2, {x, 0, Pi}]
Hi, Andreas!
This works:
Clear[S2]
S2={Sin[x],Cos[x]};
Plot[Evaluate[S2], {x, 0, Pi}]
|gives an error - Mathematica complains that S2 is not a machine-size
|number.
|
|BTW: I don't want S2 to be pattern cause I want to use this as follows:
|
| Clear[S,dx,S3,x];
| S[x_]:={Sin[x/dx], Cos[x/dx], Sin[2*x/dx]}; | S3=Evaluate[S[x] /. dx
-> 2];
| Plot[S3, {x, 0, Pi}];
This may be:
Clear[S,dx,S3,x]
S[x_]:={Sin[x/dx], Cos[x/dx], Sin[2*x/dx]}
S3=S[x]/. dx -> 2
Plot[Evaluate[S3], {x, 0, Pi}]
Your problem is in Evaluate[]. Look in the help. The example given there
will explain you why you have this problem.
Hope this helps.
--------------------------------------------------------------------------
Julian Stoev <j.h.stoev@ieee.org> - Ph. D. Student Intelligent
Information Processing Lab. - Seoul National University, Korea