Plotting users in Matlab

Question

Aftab Ahmed Khan 2014-7-21

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https://ww2.mathworks.cn/matlabcentral/answers/142771-plotting-users-in-matlab

回答： Star Strider 2014-7-21

Hi everyone, I have coded the following figure, in which the users are randomly distributed between the four blocks. I want the users to be only on the street, not inside the building block. Any help will be really appreciated. Thank you guys.

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Answer 1

Star Strider 2014-7-21

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https://ww2.mathworks.cn/matlabcentral/answers/142771-plotting-users-in-matlab#answer_145837

在 MATLAB Online 中打开

Use the inpolygon function:

Compare the two plots:

Users = 2*rand(20,2);
Bldg = [0.5 0.5; 0.5 1.5; 1.5 1.5; 1.5 0.5; 0.5 0.5];
figure(1)
plot(Bldg(:,1), Bldg(:,2))
hold on
scatter(Users(:,1), Users(:,2), 'xb')
hold off
axis([0  2    0  2])
axis equal square
Street = inpolygon(Users(:,1), Users(:,2), Bldg(:,1), Bldg(:,2));
figure(2)
plot(Bldg(:,1), Bldg(:,2))
hold on
scatter(Users(Street==0,1), Users(Street==0,2), 'xb')
hold off
axis([0  2    0  2])
axis equal square