how can i plot multiple circles ?

am trying to plot multiple circles within polygon. i know the center point(vector p and q coordinates of centers) of each circle. am trying the following code but getting only one circle in plot as shown in the figure.

p=[50 68 12 45];

   q=[59 90 16 74];

for i=1:length(p)

      xunit=xp + p(i)

      yunit=yp + q(i)

end

plot(xunit, yunit, 'b')

Answer 1

[KSSV]

figure
hold on
  for i=1:length(p)
        xunit=xp + p(i)
        yunit=yp + q(i)
      plot(xunit, yunit, 'Ob')
  end

[ammara khurshid]

thank you

[KSSV]

You can increase the circle size by specifying marker sizes.

Answer 2

[Walter Roberson]

 radius = 5 * ones(length(p), 1);
 viscircles( [p(:), q(:)], radius);

[ammara khurshid]

i want circle around each point represented by triangle in the figure

[Walter Roberson]

Provided your p and q are the coordinates of the triangles, then my code would do that. You just have to decide what radius you want.