creatting a polygon in matlab

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hi
im going to create a polygon that is combination with points and function.
look at this picture
fourmula of top function is : y = 10+1*exp((-(x-15).^2)/10);
i want to creat a polygon the hatched figured
please help, thanks

Accepted Answer

Matteo Lo Preti
Matteo Lo Preti on 4 Oct 2020
x = linspace(0,30,50);
y = 10+1*exp((-(x-15).^2)/10);
x = [30 30 0 x];
y = [10 0 0 y];
warning('off', 'MATLAB:polyshape:repairedBySimplify')
polygon = polyshape(x,y);
figure;
plot(polygon);
  2 Comments
Mili Kian
Mili Kian on 4 Oct 2020
thanks alot.
and im sorry,
i have another question i have a lot of points and i want to find if this points is in polygon or not ?
my points are:
X Y
0.50000000 0.50000000
0.50000000 1.5000000
0.50000000 2.5000000
0.50000000 3.5000000
0.50000000 4.5000000
0.50000000 5.5000000
0.50000000 6.5000000
0.50000000 7.5000000
0.50000000 8.5000000
0.50000000 9.5000000
0.50000000 10.500000
0.50000000 11.500000
0.50000000 12.500000
0.50000000 13.500000
0.50000000 14.500000
0.50000000 15.500000
1.5000000 0.50000000
1.5000000 1.5000000
1.5000000 2.5000000
1.5000000 3.5000000
1.5000000 4.5000000
1.5000000 5.5000000
1.5000000 6.5000000
1.5000000 7.5000000
1.5000000 8.5000000
1.5000000 9.5000000
1.5000000 10.500000
1.5000000 11.500000
1.5000000 12.500000
1.5000000 13.500000
1.5000000 14.500000
1.5000000 15.500000
2.5000000 0.50000000
2.5000000 1.5000000
2.5000000 2.5000000
2.5000000 3.5000000
2.5000000 4.5000000
2.5000000 5.5000000
2.5000000 6.5000000
2.5000000 7.5000000
2.5000000 8.5000000
2.5000000 9.5000000
2.5000000 10.500000
2.5000000 11.500000
2.5000000 12.500000
2.5000000 13.500000
2.5000000 14.500000
2.5000000 15.500000
3.5000000 0.50000000
3.5000000 1.5000000
3.5000000 2.5000000
3.5000000 3.5000000
3.5000000 4.5000000
3.5000000 5.5000000
3.5000000 6.5000000
3.5000000 7.5000000
3.5000000 8.5000000
3.5000000 9.5000000
3.5000000 10.500000
3.5000000 11.500000
3.5000000 12.500000
3.5000000 13.500000
3.5000000 14.500000
3.5000000 15.500000
4.5000000 0.50000000
4.5000000 1.5000000
4.5000000 2.5000000
4.5000000 3.5000000
4.5000000 4.5000000
4.5000000 5.5000000
4.5000000 6.5000000
4.5000000 7.5000000
4.5000000 8.5000000
4.5000000 9.5000000
4.5000000 10.500000
4.5000000 11.500000
4.5000000 12.500000
4.5000000 13.500000
4.5000000 14.500000
4.5000000 15.500000
5.5000000 0.50000000
5.5000000 1.5000000
5.5000000 2.5000000
5.5000000 3.5000000
5.5000000 4.5000000
5.5000000 5.5000000
5.5000000 6.5000000
5.5000000 7.5000000
5.5000000 8.5000000
5.5000000 9.5000000
5.5000000 10.500000
5.5000000 11.500000
5.5000000 12.500000
5.5000000 13.500000
5.5000000 14.500000
5.5000000 15.500000
then what am i do?
Matteo Lo Preti
Matteo Lo Preti on 4 Oct 2020
Hi, have a look at the inpolygon function!

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More Answers (1)

Alan Stevens
Alan Stevens on 4 Oct 2020
You could also use the patch function
x = [0 0:30 30 0];
y = [0 10+exp((-(x(2:end-2)-15).^2)/10) 0 0];
patch(x,y,'r')

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