1. All MATLAB® Plot Types
  2. fimplicit

MATLAB - fimplicit

Plot Implicit Function

Plot the hyperbola described by the function x2-y2-1=0 over the default interval of [-5 5] for x and y.

  fimplicit(@(x,y) x.^2 - y.^2 - 1)
fig2plotly()

Specify Plotting Interval

Plot the function x2+y2-3=0 over the intervals [-3 0] for x and [-2 2] for y.

  f = @(x,y) x.^2 + y.^2 - 3;
fimplicit(f,[-3 0 -2 2])
fig2plotly()

Modify Appearance of Implicit Plot

Plot two circles centered at (0,0) with different radius values. For the first circle, use a dotted, red line. For the second circle, use a dashed, green line with a line width of 2 points.

  f1 = @(x,y) x.^2 + y.^2 - 1;
fimplicit(f1,':r')

hold on
f2 = @(x,y) x.^2 + y.^2 - 2;
fimplicit(f2,'--g','LineWidth',2)
hold off
fig2plotly()

Modify Implicit Plot After Creation

Plot the implicit function ysin(x)+xcos(y)-1=0 and assign the implicit function line object to the variable fp.

  fp = fimplicit(@(x,y) y.*sin(x) + x.*cos(y) - 1)
fig2plotly()

  
fp = 
  ImplicitFunctionLine with properties:

     Function: @(x,y)y.*sin(x)+x.*cos(y)-1
        Color: [0 0.4470 0.7410]
    LineStyle: '-'
    LineWidth: 0.5000

  Show all properties



fig2plotly()

Use fp to access and modify properties of the implicit function line object after it is created. For example, change the color, line style, and line width.

  fp.Color = 'r';
fp.LineStyle = '--';
fp.LineWidth = 2;
fig2plotly()