MATLAB: Hello , I have an issue with getting everything to show on the figure correctly. I made four subplots but for some reason the 4th subplot is not showing and also the legend, text and title is not showing correctly either

subplot

Hello ,
I have an issue with getting everything to show on my figure correctly. I made four subplots but for some reason my 4th subplot is not showing and also the legend, text and title is not showing correctly either
please help
Here's my code 
%% Plot
 figure;
 plot(t,x11,'-*'),hold on;
 plot(t,x(:,1),'-')
 title('x1 vs Non-linear')
 legend({'x1','Non-linear'},'Location','northeast')
 txt = {'eq point [0.5,0.5]','initial point[0.51,0.51]'};
 text(.4,10,txt)
 subplot(2,2,1)
 plot(t,x12,'-*'),hold on;
 plot(t,x(:,2),'-')
 title('x2 vs Non-linear')
 legend({'x2','Non-linear'},'Location','northeast')
 txt = {'eq point [0.5,0.5]','initial point[0.51,0.51]'};
 text(.4,10,txt)
 subplot(2,2,2)
 
 plot(t,x13,'-*'),hold on;
 plot(t,x1(:,1),'-')
 title('x1 vs Non-linear')
 legend({'x1','Non-linear'},'Location','northeast')
 txt = {'eq point [0.5,0.5]','initial point[1,1]'};
 text(.4,10,txt)
 subplot(2,2,3)
 plot(t,x14,'-*'),hold on;
 plot(t,x1(:,2),'-');
 title('x2 vs Non-linear')
 legend({'x2','Non-linear'},'Location','northeast')
 txt = {'eq point [0.5,0.5]','initial point[1,1]'};
 text(.4,10,txt)
 subplot(2,2,4)

Best Answer

You plot() BEFORE you create the subplot; so the first plot is killed/destroyed after it is made when the subplot(2,2,1) call is made--then what is intended to be the second plot is plotted into that subplot axes. Same thing for the subsequent -- each is plotted into the subplot axes creathed ahead of it. There's no plot() command after the last suplot() axes is created; hence it's empty.
MORAL: Create the subplot() axis FIRST, then plot into it.
figure;
subplot(2,2,1)
plot(t,x11,'-*'),hold on;
plot(t,x(:,1),'-')
title('x1 vs Non-linear')
legend({'x1','Non-linear'},'Location','northeast')
txt = {'eq point [0.5,0.5]','initial point[0.51,0.51]'};
text(.4,10,txt)
 
subplot(2,2,2)
plot(t,x12,'-*'),hold on;
plot(t,x(:,2),'-')
...
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