Re: A question for Maxima users. More motion madness

"Peter Nachtwey" <pnachtwey@xxxxxxxxxxx> writes:

I have a program that calculates a point to point motion profile using seven
third order motion segments. This part is not hard. Maxima easily finds
the solution. This is just a warm up for more difficult problems that
Mathcad can't solve.

The problem I am having is getting the plot to work. I think there is
something wrong with my pos(t) routine that keeps it from be plotted. I can
plot2d(sin(t),[t,0,0.6]) but plot2s(x(t),[t,0,0.6]) doesn't work. It took me
all morning to get this far. I have got the pos(t) function to work from
the command line but not when running the whole program.

I also have found wxMaxima to be unstable. To keep from losing my program I
edit it in another editor and then cut and paste the program into the
multiline edit box in wxMaxima. Are there any that just run Maxima from the
editor and compile the code from within the editor?

The problem with your program (well, the reason it won't run) is that
you need a ; after the last bracket of pos(t)'s definition.

About the other question, I can think of 2 possibilities:

1) There's a batch command (hit ?? batch in maxima to see the doc)
which will load your code, so you could always use that.

2) If you're using emacs (yay!) then try out the maxima mode bundled
with the program. The directory layout changed in CVS over the last
few months so I don't know where this will be in your distribution,
but somewhere there should be a maxima.el and a maxima-font-lock.el
library. Somehow put them in your load-path (I was lame and copied
them) and require or autoload or whatever, and you can run a slave
maxima, sending bits of the buffer you're working on to it with
keyboard shortcuts.

In general, you'll get more help for this sort of question from the
maxima mailing list [1] : about half of the posts are dev-related and
the other half about using it.

And about wxMaxima being unstable, I'm sure they'd be interested to
hear of any reproducible crashes - this is free software: it's got no
excuse for having bugs! :)


Rupert


[1] http://maxima.sourceforge.net/maximalist.html
.

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