In your code 'fs' is not defined so I m not able to generate the figure.

But as I can see you have generated the figure and wanted to modify it as figure 2.

So after preparing this figure, you can edit the figure properties. open property inspector and do the needful.

1. Increase the size of legends

2. Name legend

Even you can change font size and type.

Shekh Mukhtar Mansuri

Dear sir

Fs = 200Hz

I tried using the plotoptions technique given in the documentation but couldn't change the marker properties.

Kindly let me know how to do that.

Thank You

Try to use the function 'zplane' instead of 'pzplot', as shown below.

>> [Hz, Hp, H] = zplane(b, a);

>> grid;

>> set(Hz, 'Color', 'b');

>> set(Hp, 'Color', 'r');

>> text(-0.1, -0.1, 'Pole', 'Color', 'r');

>> text(-0.4, 0.85, 'Zero', 'Color', 'b');

You can use 'set(Hz, ...)', 'set(Hp, ...)' to change the 'Color', 'Marker', 'MarkerSize', and so on.

Good luck.

Krishnapriya G B

To label the poles and zeros with names and different colors in the pole-zero plot, you need to add the following code after creating the transfer function t1:

hold on;

p = pole(t1); % extract the poles of the transfer function

z = zero(t1); % extract the zeros of the transfer function pzplot(t1); % plot the pole-zero diagram

title('Pole-Zero Plot of Transfer Function');

xlabel('Real');

ylabel('Imaginary');

% Plot poles with red x

for i = 1:length(p) plot(real(p(i)),imag(p(i)),'rx','MarkerSize',12,'LineWidth',2); end

% Plot zeros with blue o

for i = 1:length(z) plot(real(z(i)),imag(z(i)),'bo','MarkerSize',12,'LineWidth',2); end

legend('Poles','Zeros','Location','best');

hold off;