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matlabsolverinequality

Solving an inequality with the "<>" in MATLAB

How to solve an inequality in MATLAB with the <> operator, I tried to run the following example (the solution is x=y or y):

syms x y;
eqn1 = x^2==y^2;
eqn2 = 3*x<>3*y;
eqn = [eqn1 eqn2];
solve(eqn)

but I get an error. The help doesn't give an answer. If there's not a built-in solution, how can I specify the values to except for the solve function

Solution

  • The not equal operator <> is defined in Matlab as ~= (docs), so you could change your code to:

    syms x y;
eqn1 = x^2 == y^2;
eqn2 = 3*x ~= 3*y;
eqn = [eqn1 eqn2];
solve(eqn)