Campus Livre
fimplicit
Plots an implicit curve defined by f(x,y) = 0.
Category: Graphics > 2-D and 3-D Plots
Syntax
fimplicit(f)Plots the set where f(x,y) = 0 over the default region -5 < x < 5, -5 < y < 5.
fimplicit(f, [min max])Uses the same interval for x and y.
fimplicit(f, [xmin xmax ymin ymax])Sets each interval.
h = fimplicit(___)Also returns the line handle.
Description
Curves that cannot be solved for y, such as a circle or an ellipse, can be drawn directly. To plot g(x,y) = c, pass @(x,y) g(x,y) - c.
Input arguments
f- Function handle of
xandy. The curve is where its value is zero. interval- Two or four numbers that set the region.
Output arguments
h- Handle to the implicit function line.
Example
Circle and ellipse
fimplicit(@(x,y) x.^2 + y.^2 - 1, [-2 2])
hold on
fimplicit(@(x,y) x.^2/4 + y.^2 - 1)
hold off
axis equalIn the app, the figure is drawn below the code.