Matplotlib 绘制天文散点图-平均值与经度(银河系)
我想在healpix文件中创建一个以X轴作为经度坐标的散点图 (Healpix) Y轴作为hdf5文件中的平均值 (法拉第天空2020) 迄今为止的代码:Matplotlib 绘制天文散点图-平均值与经度(银河系),matplotlib,scatter-plot,hdf5,astropy,astronomy,Matplotlib,Scatter Plot,Hdf5,Astropy,Astronomy,我想在healpix文件中创建一个以X轴作为经度坐标的散点图 (Healpix) Y轴作为hdf5文件中的平均值 (法拉第天空2020) 迄今为止的代码: from astropy.io import fits #libraries from astropy import units as u from astropy.coordinates import Galactic import matplotlib.pyplot as plt import
from astropy.io import fits #libraries
from astropy import units as u
from astropy.coordinates import Galactic
import matplotlib.pyplot as plt
import h5py
from astropy_healpix import HEALPix
import numpy as np
filename='pixel_coords_map_ring_galactic_res9.fits' #healpix
hdulist=fits.open(filename)
nside = hdulist[1].header['NSIDE']
order = hdulist[1].header['ORDERING']
hp = HEALPix(nside=nside, order=order, frame=Galactic())
print(hdulist[1].header)
print(nside)
print(order)
ggl = hdulist[1].data['LONGITUDE'] #storing coordinate values in ggl and ggb
ggb = hdulist[1].data['LATITUDE']
print(ggl)
gl = ggl * u.degree #convering to galactic coordinates
gb = ggb * u.degree
print(gl)
c = Galactic(l=gl,b=gb)
l_rad = c.l.wrap_at(180 * u.deg).radian #X Axis
b_rad = c.b.radian
with h5py.File('faraday2020.hdf5','r') as hdf: #importing raw data from hdf5 file
print(hdf.keys())
faraday_sky_mean = hdf['faraday_sky_mean'][:] #Y Axis
faraday_sky_std = hdf['faraday_sky_std'][:]
我完全不知道如何绘制二维方形散点图,因为经度和平均值的格式不同。另外,我需要经度在银河系坐标系中。请帮忙。我想你很接近了。嗯,这个散点图比使用两个天空图坐标(
projection=“aitoff”
)进行绘制要容易。这个过程类似于我在您之前的问题上发布的答案:。您只需要在函数参数中添加一些小柚木
我修改了你的代码,创建了一个二维散点图。以下是差异的简要总结:
- 从astropy.com导入SkyCoord更改了
(而不是
)HEALPix
- 更改了matplot类型(删除投影=)
- 在散点图上将y变量从
更改为b_rad
faraday_sky_mean
- 已从
中删除plt.scatter()
,因此数据点不进行颜色编码c=faraday\u sky\u mean
from astropy import units as u
from astropy.coordinates import SkyCoord
import matplotlib.pyplot as plt
import h5py
#from astropy_healpix import HEALPix
import numpy as np
fits_file = 'pixel_coords_map_ring_galactic_res9.fits' #healpix
faraday_file = 'faraday2020.hdf5'
with fits.open(fits_file) as hdulist:
nside = hdulist[1].header['NSIDE']
order = hdulist[1].header['ORDERING']
#hp = HEALPix(nside=nside, order=order, frame=Galactic())
#print(hdulist[1].header)
#print(nside)
#print(order)
ggl = hdulist[1].data['LONGITUDE'] #storing coordinate values in ggl and ggb
ggb = hdulist[1].data['LATITUDE']
#print(ggl)
gl = ggl * u.degree #convering to galactic coordinates
gb = ggb * u.degree
#print(gl)
#c = Galactic(l=gl,b=gb)
c = SkyCoord(l=gl,b=gb, frame='galactic', unit = (u.deg, u.deg))
l_rad = c.l.wrap_at(180 * u.deg).radian #X Axis
b_rad = c.b.radian
print(len(l_rad))
with h5py.File(faraday_file,'r') as hdf: #importing raw data from hdf5 file
#print(hdf.keys())
faraday_sky_mean = hdf['faraday_sky_mean'][:] #Y Axis
print(len(faraday_sky_mean))
faraday_sky_std = hdf['faraday_sky_std'][:]
plt.figure(figsize=(8,4.2))
plt.subplot(111)
plt.title("Mean", y=1.08, fontsize=20)
plt.grid(True)
P2 = plt.scatter(l_rad, faraday_sky_mean, s=20, cmap='hsv')
plt.subplots_adjust(top=0.95, bottom=0.0)
plt.xlabel('l (deg)', fontsize=20)
plt.ylabel('Mean', fontsize=20)
plt.subplots_adjust(top=0.95, bottom=0.0)
plt.show()
print('DONE')
我想你很接近了。嗯,这个散点图比使用两个天空图坐标(
projection=“aitoff”
)进行绘制要容易。这个过程类似于我在您之前的问题上发布的答案:。您只需要在函数参数中添加一些小柚木
我修改了你的代码,创建了一个二维散点图。以下是差异的简要总结:
- 从astropy.com导入SkyCoord更改了
(而不是
)HEALPix
- 更改了matplot类型(删除投影=)
- 在散点图上将y变量从
更改为b_rad
faraday_sky_mean
- 已从
中删除plt.scatter()
,因此数据点不进行颜色编码c=faraday\u sky\u mean
from astropy import units as u
from astropy.coordinates import SkyCoord
import matplotlib.pyplot as plt
import h5py
#from astropy_healpix import HEALPix
import numpy as np
fits_file = 'pixel_coords_map_ring_galactic_res9.fits' #healpix
faraday_file = 'faraday2020.hdf5'
with fits.open(fits_file) as hdulist:
nside = hdulist[1].header['NSIDE']
order = hdulist[1].header['ORDERING']
#hp = HEALPix(nside=nside, order=order, frame=Galactic())
#print(hdulist[1].header)
#print(nside)
#print(order)
ggl = hdulist[1].data['LONGITUDE'] #storing coordinate values in ggl and ggb
ggb = hdulist[1].data['LATITUDE']
#print(ggl)
gl = ggl * u.degree #convering to galactic coordinates
gb = ggb * u.degree
#print(gl)
#c = Galactic(l=gl,b=gb)
c = SkyCoord(l=gl,b=gb, frame='galactic', unit = (u.deg, u.deg))
l_rad = c.l.wrap_at(180 * u.deg).radian #X Axis
b_rad = c.b.radian
print(len(l_rad))
with h5py.File(faraday_file,'r') as hdf: #importing raw data from hdf5 file
#print(hdf.keys())
faraday_sky_mean = hdf['faraday_sky_mean'][:] #Y Axis
print(len(faraday_sky_mean))
faraday_sky_std = hdf['faraday_sky_std'][:]
plt.figure(figsize=(8,4.2))
plt.subplot(111)
plt.title("Mean", y=1.08, fontsize=20)
plt.grid(True)
P2 = plt.scatter(l_rad, faraday_sky_mean, s=20, cmap='hsv')
plt.subplots_adjust(top=0.95, bottom=0.0)
plt.xlabel('l (deg)', fontsize=20)
plt.ylabel('Mean', fontsize=20)
plt.subplots_adjust(top=0.95, bottom=0.0)
plt.show()
print('DONE')
注:两个链接都指向法拉第天空2020数据的同一页面。但是,您的代码读取“pixel\u coords\u map\u ring\u galactic\u res9.fits”(HEALPix坐标),因此这是正确的。注意:两个链接都指向法拉第天空2020数据的同一页面。但是,您的代码读取“pixel\u coords\u map\u ring\u galactic\u res9.fits”(HEALPix坐标),所以这是正确的。