Bases: astropy.modeling.Fittable2DModel
A 2D Ellipse model.
Parameters: | amplitude : float
x_0 : float
y_0 : float
a : float
b : float
theta : float
|
---|---|
Other Parameters: | |
fixed : a dict
tied : dict
bounds : dict eqcons : list
ineqcons : list
|
Notes
Model formula:
Examples
import numpy as np
from astropy.modeling.models import Ellipse2D
from astropy.coordinates import Angle
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
x0, y0 = 25, 25
a, b = 20, 10
theta = Angle(30, 'deg')
e = Ellipse2D(amplitude=100., x_0=x0, y_0=y0, a=a, b=b,
theta=theta.radian)
y, x = np.mgrid[0:50, 0:50]
fig, ax = plt.subplots(1, 1)
ax.imshow(e(x, y), origin='lower', interpolation='none', cmap='Greys_r')
e2 = mpatches.Ellipse((x0, y0), 2*a, 2*b, theta.degree,
edgecolor='red', facecolor='none')
ax.add_patch(e2)
plt.show()
(Source code, png, hires.png, pdf)
Attributes Summary
a | |
amplitude | |
b | |
param_names | |
theta | |
x_0 | |
y_0 |
Methods Summary
evaluate(x, y, amplitude, x_0, y_0, a, b, theta) | Two dimensional Ellipse model function. |
Attributes Documentation
Methods Documentation
Two dimensional Ellipse model function.