graphical representation function of x

f =inline('2*x.^3-3*x.^2+4*x-1');
x1=2.2345;
x2=-2:0.2:2;
y1=f(x1);
y2=f(x2);
plot(x2,y2)
title('graphical representation function of x')
xlabel('graphical variable of x');
ylabel('graphical variable of y');

[Sean de Wolski]

What is your question?

Also, use an anonymous function instead of inline

f = @(x)2*x.^2-2*x.^2+4*x-1;