Plotting data on existing plot

I have this code, in which I want the data to plot on a single figure, however they all plotted seperately. I need assistance on making all the data plot on a single figure.

swvec(1)=0.1;

swvec(2)=0.2;

swvec(3)=0.3;

for i=1:3

a= swvec(i);

theta = [0 30 60 90];

b = (1/a);

v1 = sind(theta).*a;

v2 = cosd(theta).*a;

figure

plot (v1,v2)

hold on

swvec(3)

hold off

end

Answer 1

[the cyclist]

Pull the figure and hold commands out of the for loop:

swvec(1)=0.1;

swvec(2)=0.2;

swvec(3)=0.3;

figure
hold on

for i=1:3

a= swvec(i);

theta = [0 30 60 90];

b = (1/a);

v1 = sind(theta).*a;

v2 = cosd(theta).*a;

plot (v1,v2)

swvec(3)

end

hold off