Contourf 和 quiver Animation with Basemap Python

Question

我有两个不同的数据集，它们在一个公共区域上具有不同的（纬度、经度）网格。我正在尝试在公共底图上绘制一个轮廓和另一个轮廓，然后随着时间的推移对其进行动画处理。我已经关注了这个 http://matplotlib.org/basemap/users/examples.html and this https://github.com/matplotlib/basemap/blob/master/examples/animate.py.

到目前为止我有：

m = Basemap(llcrnrlon=min(lon),llcrnrlat=min(lat),urcrnrlon=max(lon),urcrnrlat=max(lat),
            rsphere=(6378137.00,6356752.3142),resolution='h',projection='merc')

# first dataset
lons, lats = numpy.meshgrid(lon, lat)
X, Y = m(lons, lats)

# second dataset
lons2, lats2 = numpy.meshgrid(lon2, lat2)
xx, yy = m(lons2, lats2)

#colormap 
levels = numpy.arange(0,3,0.1)
cmap = plt.cm.get_cmap("gist_rainbow_r")

# create figure.
fig=plt.figure(figsize=(12,8))
ax = fig.add_axes([0.05,0.05,0.8,0.85])

# contourf 
i = 0
CS = m.contourf(xx,yy,AUX[i,:,:],levels,cmap=cmap,extend='max')
cbar=plt.colorbar(CS)

# quiver
x = X[0::stp,0::stp]   #plot arrows with stp = 2
y = Y[0::stp,0::stp]
uplt = U[i,0::stp,0::stp]
vplt = V[i,0::stp,0::stp]
Q = m.quiver(x,y,uplt,vplt,color='k',scale=15)
qk = ax.quiverkey(Q,0.1,0.1,0.5,'0.5m/s')

# continents 
m.drawcoastlines(linewidth=1.25)
m.fillcontinents(color='0.8')

def updatefig(i):
    global CS, Q
    for c in CS.collections: c.remove()

    CS = m.contourf(xx,yy,AUX[i,:,:],levels,cmap=cmap,extend='max')

    uplt = U[i,0::stp,0::stp]
    vplt = V[i,0::stp,0::stp]
    Q.set_UVC(uplt,vplt)

anim = animation.FuncAnimation(fig, updatefig, frames=AUX.shape[0],blit=False)

plt.show()

第一个图（i=0）一切正常，但之后我只得到了 contourf 动画，没有叠加任何箭袋图（但出现了箭袋！）两个动画单独工作正常，但不能一起工作。底图上有两个不同的 x,y 是否有问题？

Answer 1

您可以在绘制第二部分（箭袋）之前尝试 ax.autoscale(False)。
希望对你有帮助

Answer 2

我可以通过在函数中添加箭袋图并在保存图后添加 Q.remove() 来解决这个问题。结尾是这样的：

def updatefig(i):
    global CS, Q
    for c in CS.collections: c.remove()

    CS = m.contourf(xx,yy,AUX[i,:,:],levels,cmap=cmap,extend='max')

    uplt = U[i,0::stp,0::stp]
    vplt = V[i,0::stp,0::stp]
    Q = m.quiver(x,y,uplt,vplt,color='k',scale=15)

    # SAVE THE FIGURE
    Q.remove()  #after saving the figure

 anim = animation.FuncAnimation(fig, updatefig, frames=AUX.shape[0],blit=False)

plt.show()

虽然我仍然找不到答案，但它按我的预期工作，我 set_UVC() 不适用于 contourf...

Contourf 和 quiver Animation with Basemap Python

Contourf and quiver Animation with Basemap Python

python

animation

matplotlib-basemap

contourf