Hi Jason:

Thanks for the help.  I teach a MATLAB for engineers online course at the
local univ so I tend to use MATLAB syntax by habit.  However, I'm interested
in swapping out and going to Sage/Python for the same type of early
programming class for engineers.  Thanks for the input, that helps alot.

Regards,
Steve

On Thu, Jan 15, 2009 at 7:44 PM, Jason Grout <jason-s...@creativetrax.com>wrote:

>
> Steve Yarbro wrote:
> >
> >
> > On Sun, Jan 11, 2009 at 4:13 PM, mabshoff <> wrote:
> >
> >
> >     Hi Michael:
> >
> >
> > Thanks for the help.  The error is very likely my lack of skill with
> > sage (an excellent piece of work BTW).  I have put together an example
> > as you suggested.  The support for sage is very good.  Thank you.  The
> > example URL is  http://sagenb.org:8000/home/pub/148/.   When I use the
> > zip(), the list_plot works.
> >
>
>
> Yes, you need to use zip in your case.  list_plot takes a list of
> points, like this:
>
> list_plot([ (x1,y1), (x2,y2), (x3,y3)])
>
> You were trying to pass it two lists, one of x coordinates and one of y
> coordinates.  This is how you would do things in matlab, but not Sage:
>
> list_plot([x1, x2, x3], [y1, y2, y3])
>
> The zip command just converts between these:
>
> zip([x1,x2,x3], [y1,y2,y3]) is [(x1,y1), (x2,y2), (x3,y3)]
>
>
> You can see the documentation for list_plot and zip by typing the
> command name followed by a question mark:
>
> list_plot?
>
> zip?
>
>
> Having said that, this confusion points to a bug in the list_plot
> documentation.  It should probably mention this and show how to use the
> zip command.
>
> Thanks,
>
> Jason
>
>
> >
>

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