% Program to add vectors

clear;

m = input('How many vectors ? ');

mag(1) = 0;

ang(1) = 0;

for i=1:m;

mag(i+1) = input('Enter magnitude of vector ');

ang(i+1) = input('Enter angle of vector ');

end

n=length(mag);

xcomp = mag .* cos(ang * pi/180);

ycomp = mag .* sin(ang * pi/180);

hold on;

grid;

for i = 1:n;

xvect = [0 xcomp(i)];

yvect = [0 ycomp(i)];

plot(xvect,yvect);

end;

xplt(1) = 0;

yplt(1) = 0;

for i=2:n;

xplt(i) = xplt(i-1)+xcomp(i);

yplt(i) = yplt(i-1)+ycomp(i);

end

hold off;

figure;

plot(xplt,yplt,'y');

grid;

xsum = sum(xcomp);

ysum = sum(ycomp);

xres = [0 xsum];

yres = [0 ysum];

hold on;

plot(xres,yres,'r');

res = sqrt(xsum^2 + ysum^2);

disp ('Resultant magnitude = ');

disp (res);

resang =180* (atan (ysum/xsum))/pi;

if sign(xsum) == -1;

ansang = 180 + resang;

elseif sign(ysum)== -1 ;

ansang = 360 + resang;

else

ansang = resang;

end;

disp ('Resultant angle = ');

disp (ansang);

hold off;

Great thanks dear Dr. Behrouz, I appreciate your help.

you can use quiver for plotting 2d vectors (you can get x and y from magnitude and angle as r.cos(a) and r.sin(a)