Re: [Matplotlib-users] Vector Arrows in Image Plots

[Curtis C. <cu...@hi...>]

Mr. Hunter,

Thank you for your reply.  I am considering trying to develop the 2D
vector field plots myself using line collections, as you suggest.

Cheers,
Curtis


On Sat, 12 Jun 2004, John Hunter wrote:

> >>>>> "Curtis" == Curtis Cooper <cu...@hi...> writes:
>
>     Curtis> Hi, I am excited about the relatively new imshow and
>     Curtis> pcolor features in matplotlib.  I am using numarray to
>     Curtis> reduce/diagnose planetary atmospheres simulations, which
>     Curtis> consist of temperature and velocity data on gridpoints in
>     Curtis> longitude, latitude, and pressure.
>
>     Curtis> In addition to contour plots, which is on the goals list
>     Curtis> for this project, I would like a feature added that allows
>     Curtis> me to make velocity arrows overlaying the pcolor or imshow
>     Curtis> images, as is common in meteorology maps.  Will such a
>     Curtis> feature be available in matplotlib, and if so, how soon?
>     Curtis> Thanks for all the great work so far!
>
> Hi  Curtis,
>
> Actually this is on the goals page, listed as 2D vector plots - could
> be more descriptive there.  So yes, it is a priority.  But I can't
> really give an estimate at this point of when it will be done.
>
> Working in your favor is that it should be fairly easy now that line
> collections exist.  These were implemented in 0.54 and allow the fast
> drawing of a bunch of independent line segments, which both contours
> and vector fields have.  Now that the infrastructure exists to do
> these efficiently, it makes it more likely that they will be added
> sooner rather than later.  But there are a number of other equally important
> features on the TODO list, which is why I don't have a definite
> estimate.
>
> As the goals page states
>
>   Priorities can be changed in one of two ways: convincing one of the
>   existing developers to make an item a higher priority (for example,
>   if many users request the feature) or by helping to add the feature
>   yourself (i.e., becoming a new developer).
>
> You've just done option 1.  You're invited to try option 2!
>
> Cheers,
> JDH
>