finding last column values

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busra gogen
busra gogen on 16 Jan 2021
Commented: busra gogen on 19 Jan 2021
I have 12094*3 matrix and 7*2 matrix. Second matrix is coordinates of a polygon which is bounded. I used inpolygon method to analyse the region. I obtained 237 points inside 12094*3. Now i want to find third values of inside points which are third column of 12094*3. Since inpolygon method is 2 dimensional, i have only information about how many points of 7*2 inside in the 12094*3 matrix. I tried find command but it does not work. Although i have 237 points, there are 15 values in workspace i dont know maybe i did wrong.
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KALYAN ACHARJYA
KALYAN ACHARJYA on 17 Jan 2021
Explaining through Maths is much easier than lengthy text.

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Accepted Answer

KSSV
KSSV on 17 Jan 2021
Let A be your 12094*3 matrix and P be your 7*2 matrix.
idx = inpolygon(A(:,1),A(:,2),P(:,1),P(:,2)) ;
iwant = A(idx,:) ;

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