我想用Python和matplotlib将代表可见卫星的一些值绘制成极坐标图。我在matplotlib示例后面写了一些代码,并且表示了极坐标图,但没有绘制给定的点:
import matplotlib
from matplotlib.pyplot import figure, show, rc, grid
from math import pi
# radar green, solid grid lines
rc('grid', color='#316931', linewidth=1, linestyle='-')
rc('xtick', labelsize=15)
rc('ytick', labelsize=15)
# force square figure and square axes looks better for polar, IMO
width, height = matplotlib.rcParams['figure.figsize']
size = min(width, height)
# make a square figure
fig = figure(figsize=(size, size))
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8], polar=True, axisbg='#d5de9c')
# Satellite info [PRN, E, Az, Ss, Used (1 yes, 0 no)]
sat = [ [1, 62, 255, 46, 1],
[14, 62, 26, 46, 1],
[31, 42, 158, 36, 1],
[22, 40, 76, 50, 1],
[11, 29, 308, 0, 0],
[19, 26, 243, 36, 1],
[3, 13, 217, 0, 0],
[18, 10, 93, 0, 0],
[20, 6, 291, 0, 0],
[5, 1, 72, 0, 0],
[122, 43, 216, 0, 0],
[135, 47, 203, 43, 0] ]
for index in (0, len(sat)-1):
if(sat[index][4]>0):
ax.plot(sat[index][2], sat[index][1], color='green', marker='s', markersize=12)
else:
ax.plot(sat[index][2], sat[index][1], color='gray', marker='s', markersize=12)
ax.set_rmax(2.0)
grid(True)
ax.set_title("Visible satellites", fontsize=20)
show()
我做错了什么?
答案 0 :(得分:1)
在这一行:
for index in (0, len(sat)-1):
索引仅在一对值上运行。你的意思是for index in range(0, len(sat))
?
答案 1 :(得分:1)
只需迭代你的sats列表就可以了:
for s in sat:
if(s[4]>0):
ax.plot(s[2], s[1],color='green', marker='s', markersize=5)
else:
ax.plot(s[2], s[1],color='gray', marker='s', markersize=5)
除此之外,你还使用set_rmax将方位角限制为< 2,这样只留下1个卫星可见,取消注释以查看所有卫星。
编辑: 直接解压缩列表可能会进一步提高可读性:
for (PRN, E, Az, Ss, Used) in sat:
if(Used>0):
ax.plot(Ss, Az,color='green', marker='s', markersize=5)
else:
ax.plot(Ss, Az,color='gray', marker='s', markersize=5)