python：matplotlib.Basemap.scatter不显示地图上的所有点

Question

我实际上是想在地图上绘制点。每个点都与cmd = new OleDbCommand("SELECT * FROM users WHERE [id] = " + Session_ID, conn); 中0到1000之间的值相关联。我只想用比例红色成分对点进行着色，正如您在此可重现的例子中所看到的那样：

sumlist

问题是地图上没有显示所有点。我认为import matplotlib.pyplot as plt from mpl_toolkits.basemap import Basemap m = Basemap(projection='kav7',lon_0=0,lat_0=0,resolution='l') m.drawcoastlines() m.fillcontinents(color='#ddaa66',lake_color='#7777ff') m.drawmeridians(np.arange(0.,420.,60.)) m.drawparallels(np.arange(-90.,120.,30.)) m.drawmapboundary(fill_color='#7777ff') lon_prox=[-36.4,-38.5,-77,-71,-19.8,-69.5,-10.09,-4.93,9,-91.3,-85.92,-114.2,-109.3,103,-110.1,-42.6,1.16,-20.1,-23.2,-18.2,-17.95,-17.7,-10.1,-5.87] lat_prox=[76.6,72.6,80.7,69.87,64.6,81.33,30.845,58.14,46,35.15,30.45,38.9,37.5,71.29,40,71.7,40.34,57.44,56.1,66.54,66.53,66.55,30.85,56.67] x,y=m(lon_prox,lat_prox) sumlist=[276,554,39,0,2,1,107,14,10,32,0,992,933,17,897,39,0,0,0,0,0,24,111,0] for i in range(len(x)): col='#%02x%02x%02x' % (int((255*sumlist[i])/1000),0,0) m.scatter(x[i],y[i],color=col,zorder=10) plt.show() 参数可以帮助我，因为当我将它设置为zorder（我之前没有放任何东西）时，我没有出现过一些点。但我真的不明白10是什么。我知道这个问题不应该很难解决，但我花了两个小时就完成了。

提前致谢，

Smich。

Answer 1

Scatter（）将x，y，c列表或数组作为参数。试试这段代码：

import matplotlib.pyplot as plt
from mpl_toolkits.basemap import Basemap
#import numpy as np

# defind figure dimension
fig = plt.figure(figsize=(12, 8))

m = Basemap(projection='kav7',lon_0=0,lat_0=0,resolution='l')
m.drawcoastlines(color='gray')
m.fillcontinents(color='#ddaa66',lake_color='#7777ff')
m.drawmeridians(range(0,420,60))
m.drawparallels(range(-90,120,30))
m.drawmapboundary(fill_color='#7777ff')

lon_prox=[-36.4,-38.5,-77,-71,-19.8,-69.5,-10.09,-4.93,9,-91.3,-85.92,-114.2,-109.3,103,-110.1,-42.6,1.16,-20.1,-23.2,-18.2,-17.95,-17.7,-10.1,-5.87]
lat_prox=[76.6,72.6,80.7,69.87,64.6,81.33,30.845,58.14,46,35.15,30.45,38.9,37.5,71.29,40,71.7,40.34,57.44,56.1,66.54,66.53,66.55,30.85,56.67]
x,y=m(lon_prox, lat_prox)

sumlist=[276,554,39,0,2,1,107,14,10,32,0,992,933,17,897,39,0,0,0,0,0,24,111,0]

# prep colors
hexcolors = []
for i in range(len(x)):
    hexcolors.append('#%02x%02x%02x' % (int((255*sumlist[i])/max(sumlist)),0,0))

# scatter takes x,y,c arrays as parameters
m.scatter(x, y, c=hexcolors, s=60, zorder=10, alpha=0.7) 

plt.show()