How to display a splane grid such as sgrid on the positive real axis area?

Is there a way to plot the s plane grid on both sides of the real axis?

The example code below plots poles on both the negative real and postive real axis, but the sgrid command olyn generates a grid on the neagtive real side.

figure(1)
axis(50000*[-.2,.2,-1,1]);
sgrid
ylabel('Imaginary axis');
xlabel('Real axis');
hold on
Poles = [-5000+10000i ; 5000+10000i ; -5000-10000i ; 5000-10000i];
plot(real(Poles),imag(Poles),'x');

Answer 1

[Sai Sri Pathuri]

The reason sgrid function plots the grid only on the left-hand plane is because poles in the right half plane are unstable.

However, if you want to plot the grid on the positive side of real axis, you can create a custom function by modifying the source code of sgrid to plot the grid.