why do ı receive the error "data must be numeric, datetime, duration, or an array convertible to double". How can I fix it?

R=8.314;
T=298:10:450
Prxn=1:1:5




   for j=1:size(Prxn,2)
           syms x 
           Ka=exp(((46.1)./(R.*T)+0.0993./R));
           Kaa=(((2.*x).^2.*(4-2.*x).^2)./((1-x).*(3-3.*x).^3.*(Prxn(j)).^2))-Ka==0;

           extent=solve(Kaa,x);
           
           
           plot(T,extent);
           hold on;
           
   end

Answer 1

[Rik]

Extent is still a symbolic by the time you try to plot it. You need to convert it to a double. Since you omitted the definition of T we can't test your code.

[Serra Çiftçi]

I want to test the code for T interval of 298-450 K for different P values. But I couldnt know how to write it. By the way thanks for your answer:)

[Rik]

I can't tell from your comment if the problem is solved. If so, please consider marking my answer as accepted. If not, feel free to comment with your remaining issues.