Re: [Matplotlib-users] Basemap - quiver scaling

[Eric F. <ef...@ha...>]

Jim,

The problem is that the new quiver--the one for which Jeff quoted a 
docstring extract--appeared after 0.87.3.  I hope you can update to 
0.87.4 or to svn.  I gather there will be another release within a week 
or two, also, to support the latest numpy.

Eric

James Boyle wrote:
> when I call quiver in the Basemap toolkit, the scale keyword has the  
> effect of eliminating all vectors, no matter what value I assign  
> (except None).
> I am using matplotlib 0.87.3 -  Basemap 0.9
> In any case the exact effect of the scale parameter is obscure - how  
> does is scale? units/inch, units/gridbox ???
> 
> Thanks for any help.
> --Jim
> 
> 
> the calls I use are below:
> mercMap =  
> Basemap(llcrnrlon=120.,llcrnrlat=-20,urcrnrlon=200.,urcrnrlat=20.,\
>              resolution='c',area_thresh=10000.,projection='merc',\
>              lon_0=160.,lat_ts=0.)
> istride = 3
> mercMap.quiver(x[::istride,::istride],y[::istride,::istride],uERA[:: 
> istride,::istride],vERA[::istride,::istride],scale=None)
> 
> 
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