changing a figure to a subplot

Currently stuck... This code below creates a figure and three subplots as I have designed it too. I cannot figure out how to change the figure in the while loop to a subplot with the other subplots below.

Any help is greatly appreciated.

%--------------------Value Function Interation-----------------------------
%Start Timer 
tic

Vold=zeros(1,n);
Iteration = 0;
error = 1;
while error>tol 

    [Vnew g] = max(utility+beta*Vold'*ones(1,n));
    error = max(abs(Vold - Vnew))
    Vold = Vnew;
    Iteration = Iteration + 1 

        %Set up convergence graphics -- optional 
        hold on;
        plot(kgrid,Vold)
        xlabel('k')
        ylabel('V(k) Iterations')
        title('The Convergence Process')
        hold off;

end 

k= kgrid;
kp = kgrid(g); 
c = f(k)+(1-delta)*k-kp;

%End Timer 
toc
%---------------------Create Plots for Results----------------------------
%Plot
scrsz = get(0,'ScreenSize');
figure('Position',[scrsz(3)*1/4 scrsz(4)*1/4 scrsz(3)*1/2 ...
scrsz(4)*1/2]);

subplot(2,2,1)
plot(kgrid,Vold)
xlabel('k');
ylabel('V(k)');
title('Value Function');

subplot(2,2,2)
plot(kgrid,[kgrid; step*g]);
xlabel('k');
ylabel('g(k)');
title('Policy Function');
legend('45 degree-line','Policy Function','Location','Best');

subplot(2,2,3)
plot(kgrid,c);
xlabel('k');
ylabel('c(k)');
title('Consumption');

[Chad Greene]

I'm not exactly sure what you're trying to do. Can you clarify your question?

[per isakson]

Why did you include that much code? The latter part is more than enough. I cannot run the code without a lot of guessing regarding input values.

"error = 1;" &nbsp It is not a good idea to use names of functions to name variables.

Answer 1

[per isakson]

I can neither see any mistake in your plotting code nor reproduce your problem. However, better not rely on the current handle. An example in the doc says:

Create a figure with two subplots and return the subplot axes handles, ax1 and ax2.

    figure
    ax1 = subplot(2,1,1);
    ax2 = subplot(2,1,2);

Store the data from the peaks function in matrix Z. Plot the first 20 rows of Z in the upper subplot using its handle, ax1. Plot the entire data set in the lower subplot using its handle, ax2.

    Z = peaks;
    plot(ax1,Z(1:20,:))
    plot(ax2,Z)

Thus:

Try replace your

    subplot(2,2,1)
    plot(kgrid,Vold)

by

    ax1 = subplot(2,2,1);
    plot( ax1, kgrid,Vold)

etc.

Answer 2

[Image Analyst]

If you want "to change the figure in the while loop to a subplot" then you need to call subplot() in the while loop, so you need to estimate how many plots you will be creating and then make an array for that. Let's say that you might possibly have 90 plots. Then those could fit into a 9 row by 10 column array of plots. So in the while loop you'd do this:

subplot(9, 10, Iteration);
plot(kgrid,Vold)

That way, each plot will go to its own subplot instead of a single plot that takes up the whole figure and gets replaced/overwritten each iteration like you're getting now.