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我正在尝试创建一个类似于这些的简单立体太阳路径图: http ://wiki.naturalfrequency.com/wiki/Sun-Path_Diagram

我可以旋转极坐标图并将比例设置为 90。如何反转 y 轴?当前轴从 0>90 开始,如何将轴反转为 90>0 以表示方位角?

我试过了:

ax.invert_yaxis()
ax.yaxis_inverted()

此外,我将如何创建立体投影而不是等距投影?

我的代码:

import matplotlib.pylab as plt
testFig = plt.figure(1, figsize=(8,8))
rect = [0.1,0.1,0.8,0.8]
testAx = testFig.add_axes(rect,polar=True)
testAx.invert_yaxis()
testAx.set_theta_zero_location('N')
testAx.set_theta_direction(-1)

Azi = [90,180,270]
Alt= [0,42,0]
testAx.plot(Azi,Alt)
plt.show()

目前我的代码似乎甚至没有正确绘制线条,我是否需要将角度或度数转换为其他东西?

任何帮助是极大的赞赏。

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1 回答 1

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我终于有时间玩 matplotlib。经过大量搜索,Joe Kington 指出的正确方法是对 Axes 进行子类化。我找到了一种使用出色底图模块的更快方法。

下面是我为stackoverflow改编的一些代码。太阳高度和方位角是使用 Pysolar 计算的,并带有一组在 pandas 中创建的时间序列图章。

import matplotlib.pylab as plt
from mpl_toolkits.basemap import Basemap
import numpy as np

winterAzi = datafomPySolarAzi
winterAlt = datafromPySolarAlt

# create instance of basemap, note we want a south polar projection to 90 = E
myMap = Basemap(projection='spstere',boundinglat=0,lon_0=180,resolution='l',round=True,suppress_ticks=True)
# set the grid up
gridX,gridY = 10.0,15.0
parallelGrid = np.arange(-90.0,90.0,gridX)
meridianGrid = np.arange(-180.0,180.0,gridY)

# draw parallel and meridian grid, not labels are off. We have to manually create these.
myMap.drawparallels(parallelGrid,labels=[False,False,False,False])
myMap.drawmeridians(meridianGrid,labels=[False,False,False,False],labelstyle='+/-',fmt='%i')

# we have to send our values through basemap to convert coordinates, note -winterAlt
winterX,winterY = myMap(winterAzi,-winterAlt)

# plot azimuth labels, with a North label.
ax = plt.gca()
ax.text(0.5,1.025,'N',transform=ax.transAxes,horizontalalignment='center',verticalalignment='bottom',size=25)
for para in np.arange(gridY,360,gridY):
    x= (1.1*0.5*np.sin(np.deg2rad(para)))+0.5
    y= (1.1*0.5*np.cos(np.deg2rad(para)))+0.5
    ax.text(x,y,u'%i\N{DEGREE SIGN}'%para,transform=ax.transAxes,horizontalalignment='center',verticalalignment='center')


# plot the winter values
myMap.plot(winterX,winterY ,'bo')

请注意,目前我只绘制点,您必须确保线点在日出/日落时在 alt 0 处有一个点。

立体图,注意我已经绘制了冬/夏至和秋分

于 2013-01-10T17:33:29.020 回答