Thomas Scofield wrote:
I am planning to use Sage in a vector calculus course this spring. I
have a plot of two simple vector fields which are everywhere orthogonal,
and wish to have arrows for one field colored differently than for the
other. I cannot, however, find any documentation for a "color switch",
neither for the plot_vector_field() command, nor for the show() command.
(It does appear that colors are manipulable in the
plot_vector_field3d() command.) Is there a way to do this? Thanks.
There is now :). I am posting a patch in the next few minutes to enable
colors for vector field plots. Here is an extract from the
documentation string:
Plot two orthogonal vector fields::
sage: x,y = var('x,y')
sage: a=plot_vector_field((x,y), (x,-3,3),(y,-3,3),color='blue')
sage: b=plot_vector_field((y,-x),(x,-3,3),(y,-3,3),color='red')
sage: show(a+b,aspect_ratio=1)
The picture is really pretty :).
The patch is here: http://trac.sagemath.org/sage_trac/ticket/8009
It's waiting for review and should be in the next version of Sage in a
few weeks.
Also, I've posted up a number of vector calculus worksheets I started
writing last semester here:
http://orion.math.iastate.edu/grout/courses/calculus_iii/spring_2010/sage_worksheets
Feel free to use whatever you want from those worksheets, and please let
us know of any improvements! I'll be working on these worksheets more
as I teach vector calculus this semester.
Thanks,
Jason
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