finding last column values

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.

[KALYAN ACHARJYA]

Explaining through Maths is much easier than lengthy text.

Answer 1

[KSSV]

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,:) ; 

[busra gogen]

thank you!