Python | Sympy 椭圆.方程()方法
In sympy, the function Ellipse.equation() is used to make the equation of the given ellipse.
Syntax: Ellipse.equation(x='x', y='y', _slope=None)
Parameters:
x : Label for the x-axis. Default value is ‘x’.
y : Label for the y-axis. Default value is ‘y’.
_slope : The slope of the major axis. Ignored when ‘None’.
Returns: equation : sympy expression
示例#1:
# import sympy, Point and Ellipse
from sympy import Point, Ellipse
from sympy.abc import x, y
# using Ellipse()
e1 = Ellipse(Point(1, 0), 3, 2)
# using equation()
eq1 = e1.equation(x, y);
print(eq1)
输出:
y**2/4 + (x/3 - 1/3)**2 - 1
示例#2:
# import sympy, Point and Ellipse
from sympy import Point, Ellipse
from sympy.abc import x, y
# using Ellipse()
e2 = Ellipse(Point(0, 0), 3, 2)
# using equation()
eq2 = e2.equation(x, y);
print(eq2)
输出:
x**2/9 + y**2/4 - 1
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