Unable to get all the points graphed.

I have written the code below and for some reason it is only plotting the last values of n1 and beta. What am I doing wrong? I have even tried moving the plot code outside of the For Loop and that did not change anything.

Thank you for your help!

alpha=asind(.707107);
theta=asind(.34202);
n2=1.35;
na=1;

for n1=1.0:0.01:1.4

a=sin(alpha)/(n1);
beta1=asind(a);
alpha1=beta1+theta;
b=(n1*sind(alpha1))/n2;
beta2=asind(b);
alpha2=beta2-theta;
c=(n2*sind(alpha2))/na;
beta=asind(c);

   plot(n1,beta)

end

Answer 1

[Steven]

you miss an hold on:

plot(n1,beta); hold on;

will be better.

Answer 2

[Kelly Kearney]

The plot command clears an axis unless you issue a

hold on

command. In your case, though, the loop is unnecessary:

alpha=asind(.707107); 
theta=asind(.34202); 
n2=1.35; 
na=1;

n1=1.0:0.01:1.4

a=sin(alpha)./(n1); 
beta1=asind(a); 
alpha1=beta1+theta; 
b=(n1.*sind(alpha1))./n2; 
beta2=asind(b); 
alpha2=beta2-theta; 
c=(n2.*sind(alpha2))./na; 
beta=asind(c);

plot(n1,beta)