plotting during a for loop

So I was able to get my functions working. I have the script file

 global X
i=1;
for X=0.001:0.05:0.5;
    i=i+1;
sol=fsolve(@CSTReqs,[0,0,0,0,0]);
sel(i)=sol(:,1)
hold on
plot(X,sel(i))
end

I want to plot the first solution, sel(i) as a function of X. However the plot just becomes blank and I don't know why. For every X value I get a number for sel(i). For example for X=0.001, I get sel(2)=0.9999. For X=0.0051, I get sel(3)=0.9955, and so on and so forth, so it works. How do I get the plot to work?

Answer 1

[Image Analyst]

Try a bigger marker so you can see it easier:

plot(X,sel(i), 'b*-', 'MarkerSize', 15);

Is sel(i) a single number? This line makes me think it might be a vector:

sel(i)=sol(:,1) % Take all rows in column 1 of sol.

Are you sure you don't want to plot the whole thing at once AFTER you finish the loop?