Hi,
I got this yin-yang from
http://riotorto.users.sourceforge.net/gnuplot/func2d/index.html (thanks for
it !) :
draw2d(
proportional_axes = xy,
title = "Ying-Yang",
ellipse(0,0,2,2,0,360),
fill_color = black,
filled_func = -sqrt(4-x^2),
explicit(if x < 0 then sqrt(-x^2-2*x) else -sqrt(-x^2+2*x),x,-2,2) ) $
But I need it in sagemath to get it well embedd in texmacs.
After long trying I didn't not success, my main problem is conditions.
If a good soul could do it for me all my thanks.
Kind regards,
HG
I have done this which is not really good :
y=sqrt(4-x^2);b=y
r=sqrt(-x^2-2*x);q=-sqrt(-x^2+2*x)
e=solve(b==r,y)
c=plot(b,(y,-2,2),fill=True,fillcolor="black",color="black",figsize=3,aspect_ratio=1);
c+=plot(r,(y,-2,2),fill=True,fillcolor="red",color="red",figsize=3,aspect_ratio=1)
d=plot(-b,(y,-2,2),fill=True,fillcolor="red",color="red",figsize=3,aspect_ratio=1);
d+=plot(-r,(y,-2,2),fill=True,fillcolor="red",color="red",figsize=3,aspect_ratio=1);
p=plot(q,(y,-2,2),fill=True,fillcolor="red",color="red",figsize=3);
p+=plot(q,(y,-2,2),fill=True,fillcolor="black",color="red",figsize=3)
plot(c+d+p,figsize=2,aspect_ratio=1,axes=False)
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