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我想用 Python 和 matplotlib 将一些代表可见卫星的值绘制成极坐标图。我在 matplotlib 示例之后编写了一些代码,并表示了极坐标图,但未绘制给定点:

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()

我究竟做错了什么?

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2 回答 2

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像这样迭代你的 sats 列表更简单:

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,您还使用 set_rmax 将方位角限制为 <2,这只会留下 1 颗卫星可见,取消注释以查看所有卫星。

编辑:直接解包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)
于 2012-10-18T11:24:40.790 回答
1

在这一行:

for index in (0, len(sat)-1):

index 只运行在一对值上。你是说范围for index in range(0, len(sat))吗?

于 2012-10-18T11:20:55.177 回答