我正在尝试绘制赤经 - 赤纬，Python 中的极坐标图，其中角度表示赤经，半径表示赤纬，范围在 ±30 之间。
我的代码是
import numpy
import matplotlib.pyplot as pyplot
ra = [345.389547454166689,31.892236646759279,45.893722479722229,93.955296573703706,160.079453957685217,211.154701609814822,256.486559377222193,307.258751710462889,299.691923545370344,340.364168244814834,335.077343971296386,358.126565808425880]
dec = [23.835021447037050,25.218513920000003,27.509148433518519,26.551432991388879,-25.077519630833340,-20.134061982500004,-21.042512836851849,-4.903512838240742,-0.506450475370370,14.280932901944448,19.222101837500002,18.792707990925926]
fig = pyplot.figure()
ax = fig.add_axes([0.1,0.1,0.8,0.8],polar=True)
ax.set_ylim(-30,30)
ax.set_yticks(numpy.arange(-30,30,10))
ax.scatter(ra,dec,c ='r')
pyplot.show()
这会产生下图:
显然我误解了极坐标图的工作原理，因为 RA 不对应于 theta = 0 的圆角。例如，我的一个点应该有 RA = 45.89 度，但似乎没有点对应于此.
对我做错了什么有什么建议吗？
请您参考如下方法:
绘图需要弧度。添加以下行并重新绘图显示正确:
ra = [x/180.0*3.141593 for x in ra]
