Re: Animate Command and Vector Reference
- To: mathgroup at smc.vnet.net
- Subject: [mg131426] Re: Animate Command and Vector Reference
- From: Bob Hanlon <hanlonr357 at gmail.com>
- Date: Wed, 3 Jul 2013 22:04:22 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- Delivered-to: l-mathgroup@wolfram.com
- Delivered-to: mathgroup-outx@smc.vnet.net
- Delivered-to: mathgroup-newsendx@smc.vnet.net
- References: <20130703085946.6C4086A98@smc.vnet.net>
This is a scoping issue. The a used in the Animate iterator is local to the Animate. sub = {{a, 1}, {a^2, 1}}; Animate[ Graphics[{ Line[{{0, 0}, sub[[1]] /. a -> aa}] }], {{aa, -1, "a"}, -1, 1}] Bob Hanlon On Wed, Jul 3, 2013 at 4:59 AM, William Dickinson < william.dickinson.0718 at gmail.com> wrote: > I'm new to Mathematica and I want to create some animations. I tried > something like this: > > sub = {{a, 1}, {a^2, 1}} > Animate[Graphics[{Line[{{0, 0}, sub[[1]]}]}], {a, -1, 1}] > > and Mathematica give me an error. This error ( Coordinate {a, 1} should be > a pair of numbers, or a Scaled or Offset form.) is not helpful. > > I know that I can fix this by changing sub[[1]] to {a,1}, but this is not > a great solution. I have several places in the actual Animate command that > use sub[[1]] (some in conjunction with a Table command) and it would be > painful to do all of the replacing and rewriting. How can I make something > like this work? > > I suspect that I'm missing something simple.... > > > Thanks in advance! > > Will > > > >
- References:
- Animate Command and Vector Reference
- From: William Dickinson <william.dickinson.0718@gmail.com>
- Animate Command and Vector Reference