I'm attaching the plain text file 'testcopy' which should be readable
- it can be opened with most any editor.
I must be doing something wrong, but I can't see it.
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On Jan 24, 2007, at 6:37 PM, Daniel Lakeland wrote:
> On Wed, Jan 24, 2007 at 05:09:16PM -0500, Dan Solomon wrote:
>
> ...HTML email Elided...
>
> Your email was a bit difficult to read from a non HTML email reader,
> but I gather that the problem seems to be something about how you're
> defining your expressions for the components since heavily nested
> lists are being formed .
>
> rk expects as its first argument, a list of expressions. Each
> expression is the derivative of one of the unknown dependent
> variables.
>
> here's an example:
>
> solve the system dx/dt = .1*x + .1*y, dy/dt = -.1*y^2, x0=1,y0=1, for
> x and y when t in the interval 0,1 with step size .01
>
> rk([.1*x+.1*y,-.1*y^2],[x,y],[1,1],[t,0,1,.01]);
>
> Now perhaps you can convert your equations into a similar form given
> the template?
>
> Hope that helps.
>
>
> --
> Daniel Lakeland
> dlakelan at street-artists.org
> http://www.street-artists.org/~dlakelan
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