![Can I draw the figure with the help of MATLAB code - 2019 08 28.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/235567/Can%20I%20draw%20the%20figure%20with%20the%20help%20of%20MATLAB%20code%20-%202019%2008%2028.png)
Can I draw the figure with the help of MATLAB code ?
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Mabud Sarkar
il 28 Ago 2019
Commentato: Star Strider
il 20 Ago 2020
I want to figure out the following graph to show map between two annular region as follows:
![image 1.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/235557/image%201.jpeg)
Here B is subset of A and we want to show the map from (A - B) to B.
How do I plot this graph?
Can I draw the figure with the help of MATLAB code or Mathematica ?
In that case what would be the Matlab Code ?
Help me
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Risposta accettata
Star Strider
il 28 Ago 2019
Try this:
circx = @(r,a) r.*cos(a);
circy = @(r,a) r.*sin(a);
a = linspace(0, 2*pi);
figure
fill(0.2*circx(1,a)-0.5, 0.2*circy(1,a), 'g')
hold on
fill(0.1*circx(1,a)-0.5, 0.1*circy(1,a), 'w')
fill(0.2*circx(1,a)+0.5, 0.2*circy(1,a), 'g')
fill(0.1*circx(1,a)+0.5, 0.1*circy(1,a), 'w')
hold off
axis equal
xlim([-1 1])
annotation('textarrow',[0.35, 0.7], [0.58, 0.58])
text(-0.6, 0.15, 'A-B')
text([-0.5 0.5], [0 0], 'B', 'HorizontalAlignment','center')
text(0, 0.2, '\itf\rm', 'FontSize',15)
Experiment to get the result you want.
![Can I draw the figure with the help of MATLAB code - 2019 08 28.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/235567/Can%20I%20draw%20the%20figure%20with%20the%20help%20of%20MATLAB%20code%20-%202019%2008%2028.png)
8 Commenti
Star Strider
il 20 Ago 2020
They are two separate text calls displaying two different strings.
The ‘B’ is displayed twice, once in each circle, so two positions, one for each. (I could have used two different text calls. Using one text call with two coordinates is more efficient.)
The ‘A-B’ is displayed once, so it only needs one set of coordinates.
Più risposte (2)
KALYAN ACHARJYA
il 28 Ago 2019
Modificato: KALYAN ACHARJYA
il 28 Ago 2019
Please note: I have done the Jugaad here. I have no idea what the plot represents?
I tried it for 10 minutes, hence I posted it as 2nd answer.
x=[5,5,15,15];
y=[5,5,5,5];
r=[2,1,2,1];
theta=0:pi/50:2*pi;
for i=1:4
x_circle=r(i)*cos(theta)+x(i);
y_circle = r(i)*sin(theta)+y(i);
plot(x_circle,y_circle);
if r(i)==max(r)
h=fill(x_circle,y_circle,'g');
else
h=fill(x_circle,y_circle,'w');
end
hold on;
end
text(x(1),y(1)+3,'A');
text(x(1),y(1)+1.5,'A-B');
text(x(3),y(3)+3,'A');
text(x(1),y(1),'B');
text(x(3),y(3),'B');
quiver(x(1)+1.3,y(1),10,0);
text(10,5.3,'f');
![234.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/235578/234.png)
1 Commento
Steven Lord
il 28 Ago 2019
A regular N-sided polygon (for large N) is visually indistinguishable from a circle. Try:
>> A = nsidedpoly(1000, 'Center', [0 0], 'Radius', 2);
>> B = nsidedpoly(1000, 'Center', [0 0], 'Radius', 1);
>> C = subtract(A, B);
>> plot(C, 'FaceColor', 'g')
>> axis equal
To make copies of the polyshape objects A and B at a different location, call translate on them (specifying a different variable name as output.) See this documentation page for more functions that you can use to operate on polyshape objects.
For the arrow, call annotation. For the letters, call text.
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