我使用带有mpl_toolkits底图的Spyder IDE编写了一个脚本，将GPS轨迹绘制为按速度着色的方向箭头 . 一切正常，直到我将熊猫升级到0.13 . 数据是这样的：
lon lat bearing speed m/s
2014-01-20 16:26:00 -170.681264 -14.290060 NaN NaN
2014-01-20 16:27:00 -170.681259 -14.290074 163.753636 0.026727
2014-01-20 16:28:00 -170.681259 -14.290074 180.000000 0.001172
2014-01-20 16:29:00 -170.681259 -14.290077 180.000000 0.004981
ll = [-14.294238,-170.683732]
ur = [-14.286362, -170.673260]
gMap = Basemap(projection='merc', resolution='f',
llcrnrlon=ll[1], llcrnrlat=ll[0],
urcrnrlon=ur[1], urcrnrlat=ur[0],ax=ax)
现在，当我尝试运行此行时：
gMap.quiver(AllPoints['lon'],AllPoints['lat'],sin(radians(AllPoints['bearing'])),cos(radians(AllPoints['bearing'])),latlon=True,color=Points['speed m/s'].values,scale=40,cmap=plt.cm.rainbow)
我收到此错误：
Traceback (most recent call last):
File "", line 1, in
File "C:\Python27\lib\site-packages\mpl_toolkits\basemap\__init__.py", line 559, in with_transform
x, y = self(x,y)
File "C:\Python27\lib\site-packages\mpl_toolkits\basemap\__init__.py", line 1148, in __call__
xout,yout = self.projtran(x,y,inverse=inverse)
File "C:\Python27\lib\site-packages\mpl_toolkits\basemap\proj.py", line 286, in __call__
outx,outy = self._proj4(x, y, inverse=inverse)
File "C:\Python27\lib\site-packages\mpl_toolkits\basemap\pyproj.py", line 388, in __call__
_proj.Proj._fwd(self, inx, iny, radians=radians, errcheck=errcheck)
File "_proj.pyx", line 124, in _proj.Proj._fwd (src/_proj.c:1594)
RuntimeError
如果我删除它运行的 latlon=True 争论但不显示数据 . 有什么想法有什么不对？
1 回答
无论出于何种原因，Basemap.quiver都不喜欢在升级后使用Pandas DataFrame列 . 我改变了：gMap.quiver（AllPoints ['lon']，AllPoints ['lat'] ....）to：gMap.quiver（AllPoints ['lon'] . values，AllPoints ['lat'] . values .. ..）它现在工作正常 .