Preventing variable width when using plot_implicit

Question

Plotting equation (y-x**2)**2 = x**5 with:

from sympy import init_printing, plot_implicit, symbols, Eq

init_printing()
x, y = symbols('x y', real=True)
eq = Eq((y-x**2)**2, x**5)
plot_implicit(eq, (x,0,1), (y,0,.2))

Gives:

The curve should be of constant width. What is the reason for the varying width? how can it be improved?

I tried using adaptive=False, the width is more constant at the cost of a terrible aliasing, and no longer passing through the origin:

Davide_sd · Accepted Answer · 2022-10-02 10:59:26Z

2

When using adaptive=False you can set the number of discretization points used by the algorithm:

plot_implicit(eq, (x,0,1), (y,0,.2), adaptive=False, points=4000)

Do not increase that number too much: watch out your system monitor as it will use a lot of memory!

answered Oct 2, 2022 at 10:59

Davide_sd

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1 Comment

mins Over a year ago

There is an improvement on certain aspects, the curve meets the origin. As you warned RAM is solicited and process time increases.

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