matplotlib-devel Mailing List for matplotlib

The problem appends on some paths/polygons, not all. Have a look at
the joined pictures. The to_polygons method normally take care about
polygons holes, but here some vertices are not converted, resulting in
wrong geometries.
#############
import numpy as np
import pylab as plb
a=np.recfromtxt('rpatch3.grid', delimiter='\t',names=True)
lev=np.linspace(a.ux.min(), a.ux.max(), 10)
cs=plb.tricontourf(a.lon, a.lat, a.ux, lev)
path=cs.collections[5].get_paths()[0] #210 vertices
path.to_polygons() #16 vertices :(
#############
Cheers
2011年1月14日 Michael Droettboom <md...@st...>:
> It's not obvious to me that this is wrong. The path has a MOVETO
> command (1) in the middle, and thus should require the creation of two
> polygons. Can you provide some code or pictures that demonstrate the
> problem?
>
> Mike
>
> On 01/13/2011 05:54 PM, Lionel Roubeyrie wrote:
>> Hi all,
>> Using the last 1.0.1 matplotlib version,sometimes exporting paths to
>> polygons gives wrong results like here (paths come from a
>> tricontourset) :
>> In [94]: path
>> Out[94]:
>> Path([[ 172.0079229  -43.79390934]
>>  [ 171.97660793 -43.785   ]
>>  [ 171.96206864 -43.78273625]
>>  [ 171.959    -43.78114859]
>>  ...
>>  [ 171.593    -44.00678244]
>>  [ 171.64906502 -44.01   ]
>>  [ 171.654    -44.01077106]
>>  [ 171.7068607  -44.0160044 ]], [1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
>> 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
>>  2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 2 2 2
>>  2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
>>  2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
>>  2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
>>  2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2])
>> In [95]: path.vertices.shape
>> Out[95]: (210, 2)
>>
>> but to_polygons gives another result :
>> In [98]: path.to_polygons()
>> Out[98]:
>> [array([[ 172.0079229 , -43.79390934],
>>     [ 171.86039224, -43.65   ],
>>     [ 172.081   , -43.54450289],
>>     [ 172.386   , -43.57010293],
>>     [ 172.60631978, -43.67753099],
>>     [ 172.59231502, -43.71219961],
>>     [ 172.325   , -43.78095532],
>>     [ 172.02   , -43.79497729]]),
>>  array([[ 171.715   , -44.0160044 ],
>>     [ 173.02676111, -43.92   ],
>>     [ 172.935   , -43.53340591],
>>     [ 171.40281884, -43.70029758],
>>     [ 171.37760645, -43.94389688],
>>     [ 171.54044973, -44.0037666 ],
>>     [ 171.7068607 , -44.0160044 ],
>>     [ 171.7068607 , -44.0160044 ]])]
>>
>> Cheers
>>
>>
>
>
> --
> Michael Droettboom
> Science Software Branch
> Space Telescope Science Institute
> Baltimore, Maryland, USA
>
>
> ------------------------------------------------------------------------------
> Protect Your Site and Customers from Malware Attacks
> Learn about various malware tactics and how to avoid them. Understand
> malware threats, the impact they can have on your business, and how you
> can protect your company and customers by using code signing.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> Matplotlib-devel mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
>
-- 
Lionel Roubeyrie
lio...@gm...
http://youarealegend.blogspot.com