how can I plot an array by array?

I solved an ODE with bvp5c function, but here I do not know how to plot my output data which is in array.

   for ndx = 0:1e-1:0.9  
        pc = ndx;    % pc changes the bcfun.
        sol = bvp5c(@odefun,@bcfun_1,sol);  
        theta = deval(sol,zplot,1); 
        dtheta (1,:) = (theta(2)-theta(1))./(1e-2*d);
        theta_0 (1,:) = ndx;
end

Although my code solves ODE fine, I cannot plot(theta_0,dtheta).

my main problem is how can I plot(theta_0,dtheta)? when I use this plot I just get discontinous plot.