%example of a function calling another function (here parabinfo)
function myparab()
disp('enter the coefficients for ax^2 + bx+c')
a = input('enter a')
b =input('enter b')
c=input('enter c')
x = -b/(2*a);
x1 = [x-10:0.1:x+10];
y=a*x1.^2 + b*x1+c;
plot(x1,y);
hold on;
plot(x,a*x.^2 + b*x+c,'ob');
hold off;
parabinfo(a,b,c)