Concentric Squares with random points

Hi to everybody

Someone could I help me how to create a script for two concentric squares so that I have a set of points in the difference of areas?

I have this initial code:

With the last script I reach to create two areas but I need only the points in the difference of areas

Thank you to everybody!

Thank you guys!!!

[KSSV]

You have changed the original question.....even you have unaccepted the accepted answer, even you have deleted your comment where you said thanks for the solution....why? It is not ethical of you.

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[KSSV]

clc; clear all ;
% Inner Square 
S1 = [-5 -5 ; 5 -5 ; 5 5 ; -5 5] ;
% Outer Square 
S2 = [-10 -10 ; 10 -10 ; 10 10 ; -10 10] ;
% Generqate random points 
a = -10 ; b = 10 ; 
N = 100000 ; 
x = (b-a)*rand(N,1)+a ; 
y = (b-a)*rand(N,1)+a ; 
% poins which lie inside S1 
idx = inpolygon(x,y,S1(:,1),S1(:,2)) ;
% plot
x = x(~idx) ; y = y(~idx) ; 
plot(x,y,'.b')

[Lewis HC]

Thank you friend!!!

Another question...is it posible get a same squares using for, while, else, etc??...thank you friend!!!

[KSSV]

Very much possible...