Saving two fig that can be superposed_ Matlab - matlab

Question

I am saving two matlab figures as png and I want them to have the same size in order to be perfectly superposable.
The first figure is computed by the function 'FilledCircle2' which is a circle divided in half with two colors.
The second figure is computed by function 'FilledCircleL' which is the left half of the circle computed by the function 'FilledCircle2'.
I want to be able to have two figures, both with the same size so they can be perfectly superposed.
Can someone help me understand what I am doing wrong?
Here is my code, with both of the functions and respective outputs:
function []=FilledCircle2(x0,y0,Radius,N, col1, col2)
if(N<=1)
error('N must be greater than 1');
end
hold on
axis equal
axis off
hold on
t=(0:N)*2*pi/N; %t=-pi:0.01:pi
x=Radius*cos(t)+x0;
y=Radius*sin(t)+y0;
plot(x,y)
hold on
%Divide circle in to 2 equal parts
n=2;
thetas = linspace(-pi, pi,n+1); %linspace generates n points. The space between the points is [(pi/2)-(-pi/2)]/(n)
% Specify any colors wanted
colors = [col1; col2];
for k = 1:n
tt = linspace(thetas(k), thetas(k+1));
xi = Radius * cos(tt) + x0;
yi = Radius * sin(tt) + y0;
c2= fill([xi(:); x0], [yi(:); y0], colors(k,:)); %Assign diffrent colors to each circle 'slice'
set (c2, 'edgecolor','white')
set(c2,'LineWidth',2.0)
set(gcf,'PaperUnits','inches','PaperSize',[0.8666,0.8666],'PaperPosition',[0 0 0.8666 0.8666])%setting size (130/150, 130/150, 150pixels per inch being the default size of img), paper position is imporrtant as otherwise i will have extra border
set(gca, 'Position', [0 0 1 1]);
set(gcf,'color',[0.49019607843137 0.49019607843137 0.49019607843137])%figure properties, rgb(125/255,125/255,125/255)
fig = gcf;
fig.InvertHardcopy = 'off'; %saves the fig with the set background color
%rotates the plot
az= 90; %azimuth, az, is the horizontal rotation about the z axis as measured in degrees from the negative y-axis. Positive values indicate counterclockwise rotation
el= 90; % vertical elevation of the view point in degrees
view(az,el);
hold on
end
Here is the output of the function FilledCircle2(0,0,10,300, 'y', 'r'):
[
function []=HalfFilledCircleL(x0,y0,Radius,N, col1)
if(N<=1)
error('N must be greater than 1');
end
hold on
axis equal
% axis tight
axis off
hold on
t=(0:N)*(-pi)/N; %t=-pi:0.01:pi
x=Radius*cos(t)+x0;
y=Radius*sin(t)+y0;
hold on
c1=fill(x,y,col1); %filling the semi-circle
set (c1, 'edgecolor','white') %setting the outline color of the semi-circle
set(gcf,'color',[0.49019607843137 0.49019607843137 0.49019607843137])%figure properties, rgb(125/255,125/255,125/255)
set(c1,'LineWidth',2.0)
set(gcf,'PaperUnits','inches','PaperSize',[0.8666,0.8666],'PaperPosition',[0 0 0.8666,0.8666])%setting size (130/150, 130/150, 150pixels per inch being the default size of img), paper position is imporrtant as otherwise i will have extra border
set(gca, 'Position', [0 0 1 1]);
fig = gcf;
fig.InvertHardcopy = 'off'; %saves the fig with the set background color
% %rotates the plot
az= 90; %azimuth, az, is the horizontal rotation about the z axis as measured in degrees from the negative y-axis. Positive values indicate counterclockwise rotation
el= 90; % vertical elevation of the view point in degrees
view(az,el);
end
Here is the output of the function HalfFilledCircleL(0,0,10,300, 'r'):

Answer 1

use xlim and ylim to set the xy limits of the axes:
figure;
HalfFilledCircleL(0,0,10,300, 'r');
xlim([-12 12]);ylim([-12 12]);
az= -90; %azimuth, az, is the horizontal rotation about the z axis as measured in degrees from the negative y-axis. Positive values indicate counterclockwise rotation
el= 90; % vertical elevation of the view point in degrees
view(az,el);
figure;
FilledCircle2(0,0,10,300, 'y', 'r');
xlim([-12 12]);ylim([-12 12]);