How to plot unsolvable equation

I have an equation like

y * sin( y ) = x * sin( x );

And I'm gonna plot it but its an unsolvable equation and I cant solve it for x or y and plot it normally.

How can I plot this kind of equations?

Answer 1

[DGM]

You can use fimplicit()

https://www.mathworks.com/help/matlab/ref/fimplicit.html

syms x y
eq1 = y * sin( y ) == x * sin( x );

fimplicit(eq1,[-10 10 -10 10])

Answer 2

[Matt J]

fcn=@(x,y) y .* sin( y ) - x .* sin( x );

fimplicit(fcn)