Center a subplot in the figure

I have a figure with 9 subplots and I want to place the ninth in a central position in the fifth line, but I want the same size of the others for this too. This is the code I wrote and the resulting PDF:

figure
x=linspace(1,100);
y=x;
subplot(5,2,1)
plot(x,y);
title('Subplot 1')
y=2*x;
subplot(5,2,2)
plot(x,y);
title('Subplot 2')
y=3*x;
subplot(5,2,3)
plot(x,y);
title('Subplot 3')
y=4*x;
subplot(5,2,4)
plot(x,y);
title('Subplot 4')
y=5*x;
subplot(5,2,5)
plot(x,y);
title('Subplot 5')
y=6*x;
subplot(5,2,6)
plot(x,y);
title('Subplot 6')
y=7*x;
subplot(5,2,7)
plot(x,y);
title('Subplot 7')
y=8*x;
subplot(5,2,8)
plot(x,y);
title('Subplot 8')
y=9*x;
subplot(5,1,5)
plot(x,y);
title('Subplot 9')

set(gcf,'PaperUnits','centimeters')
set(gcf,'PaperType','a4')
set(gcf,'PaperPosition',[3.5 0 15.5 28.7])
saveas(gcf, 'Test', 'pdf')

Answer 1

[dpb]

for i=1:10,hAx(i)=subplot(5,2,i);end            % create the 5x2 array
posn=mean(cell2mat(get(hAx(9:10),'position'))); % average position for bottom row
delete(hAx(10)); hAx(10)=[];                    % delete 10th, clean up handle array
set(hAx(9),'position',posn)                     % move 9 to midpoint

Answer 2

[Steven Lord]

One "block" in a 5-by-2 grid of subplots should be the same as two "blocks" side-by-side in a 5-by-4 grid of subplots, right?

x = 0:0.01:2*pi;
for k = 1:8
  subplot(5, 2, k);
  plot(x, sin(k*x));
  title(sprintf('Plot of x versus sin(%d*x)', k));
end
subplot(5, 4, [18 19])
plot(x, sin(9*x));
title('Plot of x versus sin(9*x)');

The last row in the 5-by-4 grid contains "blocks" 17, 18, 19, and 20. That's why I used [18 19].

[dpb]

"The last row in the 5-by-4 grid contains "blocks" 17, 18, 19, and 20. That's why I used [18 19]."

I have too much trouble thinking it through on the rare occasions need it so I just do the brute force of fixing up the one... :)

I know there's a way, but it never strikes me at the time...

Answer 3

[Benyamin Nemati]

see the link below, it's smae as yours:

https://www.mathworks.com/matlabcentral/answers/281262-subplot-with-odd-number-of-plots#answer_795679